diff --git a/src/AnalyzeView/AnalyzePage.qml b/src/AnalyzeView/AnalyzePage.qml
index c7e2e0924761fc6ab0458446bfd0c2663ad8f2bf..79699a44dcebe08461f08677f8e4d084a8ade903 100644
--- a/src/AnalyzeView/AnalyzePage.qml
+++ b/src/AnalyzeView/AnalyzePage.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl               1.0
 import QGroundControl.Palette       1.0
diff --git a/src/AnalyzeView/AnalyzeView.qml b/src/AnalyzeView/AnalyzeView.qml
index 89fb527ae345c7f1a5f96dbe9142a894b748b5e5..cd910754a9c1f1fbf2f890b1e2cece19d6ad94bf 100644
--- a/src/AnalyzeView/AnalyzeView.qml
+++ b/src/AnalyzeView/AnalyzeView.qml
@@ -12,8 +12,8 @@
 ///     @brief Setup View
 ///     @author Don Gagne <don@thegagnes.com>
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl               1.0
 import QGroundControl.Palette       1.0
diff --git a/src/AnalyzeView/GeoTagPage.qml b/src/AnalyzeView/GeoTagPage.qml
index 625c94fcd012111ac22664fb32a49b8831239e4c..7b0102dde8ff89ff67b4f2f239f2f274900ef3df 100644
--- a/src/AnalyzeView/GeoTagPage.qml
+++ b/src/AnalyzeView/GeoTagPage.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl               1.0
diff --git a/src/AnalyzeView/LogDownloadPage.qml b/src/AnalyzeView/LogDownloadPage.qml
index 79c263e86bcb1b6264ce8fb137b541b6fe6101b8..98917c2d318f70b30e56c7041924d152699de32a 100644
--- a/src/AnalyzeView/LogDownloadPage.qml
+++ b/src/AnalyzeView/LogDownloadPage.qml
@@ -7,10 +7,10 @@
  *
  ****************************************************************************/
 
-import QtQuick              2.7
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Controls     1.2
 import QtQuick.Dialogs      1.2
-import QtQuick.Layouts      1.3
+import QtQuick.Layouts      1.2
 
 import QGroundControl               1.0
 import QGroundControl.Palette       1.0
diff --git a/src/AutoPilotPlugins/APM/APMAirframeComponent.qml b/src/AutoPilotPlugins/APM/APMAirframeComponent.qml
index bb0f4b8269e86fbf83efb40d7bbb6ded134c0e91..b8324bcc97850f0959ba8c5a198bbab2198e2231 100644
--- a/src/AutoPilotPlugins/APM/APMAirframeComponent.qml
+++ b/src/AutoPilotPlugins/APM/APMAirframeComponent.qml
@@ -8,10 +8,10 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
-import QtQuick.Layouts  1.3
+import QtQuick.Layouts  1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/APM/APMAirframeComponentSummary.qml b/src/AutoPilotPlugins/APM/APMAirframeComponentSummary.qml
index b962a8befc3023c4d77b9368713ddeed41734cfd..4f9f447ed8b02dd9b25e128887a9b9103bc7db61 100644
--- a/src/AutoPilotPlugins/APM/APMAirframeComponentSummary.qml
+++ b/src/AutoPilotPlugins/APM/APMAirframeComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/AutoPilotPlugins/APM/APMCameraComponent.qml b/src/AutoPilotPlugins/APM/APMCameraComponent.qml
index 2df39dbfb04cd49d3a3436bdcc42b019648492ae..bd9308ff3661e88ae00a9f25fb042fd1612bc487 100644
--- a/src/AutoPilotPlugins/APM/APMCameraComponent.qml
+++ b/src/AutoPilotPlugins/APM/APMCameraComponent.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick              2.7
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Controls     1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/APM/APMCameraComponentSummary.qml b/src/AutoPilotPlugins/APM/APMCameraComponentSummary.qml
index d24ddb2933cbc91c23063609fe6305121346ee7f..c97de7af0ccb45f0187459dbde2508da4d5c7e8c 100644
--- a/src/AutoPilotPlugins/APM/APMCameraComponentSummary.qml
+++ b/src/AutoPilotPlugins/APM/APMCameraComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/AutoPilotPlugins/APM/APMFlightModesComponent.qml b/src/AutoPilotPlugins/APM/APMFlightModesComponent.qml
index a105c5e044deae106dff3605819d6c12a99a53f1..5505473f3a3a8351a22604306bc43781775f5639 100644
--- a/src/AutoPilotPlugins/APM/APMFlightModesComponent.qml
+++ b/src/AutoPilotPlugins/APM/APMFlightModesComponent.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/APM/APMFlightModesComponentSummary.qml b/src/AutoPilotPlugins/APM/APMFlightModesComponentSummary.qml
index f61a170305fdf40661b0b6d8dc1bcfed64d66485..fe6cb2bcd736db96f13d60447d2d79c9d9e0639b 100644
--- a/src/AutoPilotPlugins/APM/APMFlightModesComponentSummary.qml
+++ b/src/AutoPilotPlugins/APM/APMFlightModesComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/APM/APMLightsComponent.qml b/src/AutoPilotPlugins/APM/APMLightsComponent.qml
index 7be9951584c0ad2812f8f6ec5e89dbfd0885cd3c..8e16b04e4b9c18bb642b5ee3fed6fdcdd5daa6c0 100644
--- a/src/AutoPilotPlugins/APM/APMLightsComponent.qml
+++ b/src/AutoPilotPlugins/APM/APMLightsComponent.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick              2.7
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Controls     1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/APM/APMLightsComponentSummary.qml b/src/AutoPilotPlugins/APM/APMLightsComponentSummary.qml
index a96c4f4d4eea3ce7efea982af09068076c3803b6..2f06d3b276a0f59c8d8e0dac09b17f797ecc7901 100644
--- a/src/AutoPilotPlugins/APM/APMLightsComponentSummary.qml
+++ b/src/AutoPilotPlugins/APM/APMLightsComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/AutoPilotPlugins/APM/APMNotSupported.qml b/src/AutoPilotPlugins/APM/APMNotSupported.qml
index 7207f3cc26b72e8f1b6765afa7e34baf3cdf672e..c89bd61b310652d1f4c80e44e06ba1675adee8ff 100644
--- a/src/AutoPilotPlugins/APM/APMNotSupported.qml
+++ b/src/AutoPilotPlugins/APM/APMNotSupported.qml
@@ -8,7 +8,7 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl.Controls 1.0
 
diff --git a/src/AutoPilotPlugins/APM/APMPowerComponent.qml b/src/AutoPilotPlugins/APM/APMPowerComponent.qml
index 361b349cb82058c703c94cd7c03d954fcb0ba1e6..e14305f2dbc42c3930160c9d4d55fe52f8ed182e 100644
--- a/src/AutoPilotPlugins/APM/APMPowerComponent.qml
+++ b/src/AutoPilotPlugins/APM/APMPowerComponent.qml
@@ -8,10 +8,10 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
-import QtQuick.Layouts  1.3
+import QtQuick.Layouts  1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/APM/APMPowerComponentSummary.qml b/src/AutoPilotPlugins/APM/APMPowerComponentSummary.qml
index fa0c34f456a7aa0e0ee88a4f0d364521ae7b68ea..373d6ffa7d6bc352fd063fcfe81ab22d6a38f6df 100644
--- a/src/AutoPilotPlugins/APM/APMPowerComponentSummary.qml
+++ b/src/AutoPilotPlugins/APM/APMPowerComponentSummary.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/APM/APMRadioComponentSummary.qml b/src/AutoPilotPlugins/APM/APMRadioComponentSummary.qml
index 2fe3b105a1c831682032f00e4cdb1b916b9841d7..5433dc9971fd14e827f1d817e4199b43a14c5b86 100644
--- a/src/AutoPilotPlugins/APM/APMRadioComponentSummary.qml
+++ b/src/AutoPilotPlugins/APM/APMRadioComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/AutoPilotPlugins/APM/APMSafetyComponentCopter.qml b/src/AutoPilotPlugins/APM/APMSafetyComponentCopter.qml
index a1ec061a5664699d70a19ec1834d12ca649d292d..24f5c0752aa87a94d3078ee3bd8f99fcc385edc7 100644
--- a/src/AutoPilotPlugins/APM/APMSafetyComponentCopter.qml
+++ b/src/AutoPilotPlugins/APM/APMSafetyComponentCopter.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick              2.7
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Controls     1.2
 import QtGraphicalEffects   1.0
 
 import QGroundControl.FactSystem    1.0
diff --git a/src/AutoPilotPlugins/APM/APMSafetyComponentPlane.qml b/src/AutoPilotPlugins/APM/APMSafetyComponentPlane.qml
index 7055357886f3649c899a45322b33f33c475336aa..700603914711e3490ba84eaba9df72801d23fbd1 100644
--- a/src/AutoPilotPlugins/APM/APMSafetyComponentPlane.qml
+++ b/src/AutoPilotPlugins/APM/APMSafetyComponentPlane.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick              2.7
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Controls     1.2
 import QtGraphicalEffects   1.0
 
 import QGroundControl.FactSystem    1.0
diff --git a/src/AutoPilotPlugins/APM/APMSafetyComponentRover.qml b/src/AutoPilotPlugins/APM/APMSafetyComponentRover.qml
index 7207f3cc26b72e8f1b6765afa7e34baf3cdf672e..c89bd61b310652d1f4c80e44e06ba1675adee8ff 100644
--- a/src/AutoPilotPlugins/APM/APMSafetyComponentRover.qml
+++ b/src/AutoPilotPlugins/APM/APMSafetyComponentRover.qml
@@ -8,7 +8,7 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl.Controls 1.0
 
diff --git a/src/AutoPilotPlugins/APM/APMSafetyComponentSub.qml b/src/AutoPilotPlugins/APM/APMSafetyComponentSub.qml
index 6a3b25d80fcb6c694865f217f11a377304f4bb3e..b9b74112740059407b71064c995bb98fe73a09fc 100644
--- a/src/AutoPilotPlugins/APM/APMSafetyComponentSub.qml
+++ b/src/AutoPilotPlugins/APM/APMSafetyComponentSub.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick              2.7
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Controls     1.2
 import QtGraphicalEffects   1.0
 
 import QGroundControl.FactSystem    1.0
diff --git a/src/AutoPilotPlugins/APM/APMSafetyComponentSummaryCopter.qml b/src/AutoPilotPlugins/APM/APMSafetyComponentSummaryCopter.qml
index 12c8ceaf3a6c01e582eb948405cc2b9a7478e6fc..785147b391bfd18a08283baa67daaf8f12b10c35 100644
--- a/src/AutoPilotPlugins/APM/APMSafetyComponentSummaryCopter.qml
+++ b/src/AutoPilotPlugins/APM/APMSafetyComponentSummaryCopter.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/AutoPilotPlugins/APM/APMSafetyComponentSummaryPlane.qml b/src/AutoPilotPlugins/APM/APMSafetyComponentSummaryPlane.qml
index f3da5bc02ad94ddfc82a50b419eadaa2508ab419..10f0638464a5e8dfe7aa5cffd8421ab950030e5f 100644
--- a/src/AutoPilotPlugins/APM/APMSafetyComponentSummaryPlane.qml
+++ b/src/AutoPilotPlugins/APM/APMSafetyComponentSummaryPlane.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/AutoPilotPlugins/APM/APMSafetyComponentSummaryRover.qml b/src/AutoPilotPlugins/APM/APMSafetyComponentSummaryRover.qml
index 7207f3cc26b72e8f1b6765afa7e34baf3cdf672e..c89bd61b310652d1f4c80e44e06ba1675adee8ff 100644
--- a/src/AutoPilotPlugins/APM/APMSafetyComponentSummaryRover.qml
+++ b/src/AutoPilotPlugins/APM/APMSafetyComponentSummaryRover.qml
@@ -8,7 +8,7 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl.Controls 1.0
 
diff --git a/src/AutoPilotPlugins/APM/APMSafetyComponentSummarySub.qml b/src/AutoPilotPlugins/APM/APMSafetyComponentSummarySub.qml
index fd81d910a24c83ee332f1583319945ec502424cf..20b318c825774f4b3c7aa0b8368a00c522d3a70b 100644
--- a/src/AutoPilotPlugins/APM/APMSafetyComponentSummarySub.qml
+++ b/src/AutoPilotPlugins/APM/APMSafetyComponentSummarySub.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/AutoPilotPlugins/APM/APMSensorsComponent.qml b/src/AutoPilotPlugins/APM/APMSensorsComponent.qml
index 536311d3b5b776ae356fc29a3ff9aecfab94b044..e465e08bd84b15ca2ac9ff990fa69548a7900837 100644
--- a/src/AutoPilotPlugins/APM/APMSensorsComponent.qml
+++ b/src/AutoPilotPlugins/APM/APMSensorsComponent.qml
@@ -8,11 +8,11 @@
  ****************************************************************************/
 
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
-import QtQuick.Layouts          1.3
+import QtQuick.Layouts          1.2
 
 import QGroundControl               1.0
 import QGroundControl.FactSystem    1.0
diff --git a/src/AutoPilotPlugins/APM/APMSensorsComponentSummary.qml b/src/AutoPilotPlugins/APM/APMSensorsComponentSummary.qml
index 2f616eb43d11e2af77f861c74d52db12cdbd7bb6..bd209e9522ac1d2749f7a48c17a7544d55a2ec92 100644
--- a/src/AutoPilotPlugins/APM/APMSensorsComponentSummary.qml
+++ b/src/AutoPilotPlugins/APM/APMSensorsComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 
 import QGroundControl.FactSystem    1.0
diff --git a/src/AutoPilotPlugins/APM/APMSubFrameComponent.qml b/src/AutoPilotPlugins/APM/APMSubFrameComponent.qml
index 26375d65244a0a717f489d5e1a9873557e349536..d5d2e35395c2b43ac544a871b9c71430a103daa8 100644
--- a/src/AutoPilotPlugins/APM/APMSubFrameComponent.qml
+++ b/src/AutoPilotPlugins/APM/APMSubFrameComponent.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick              2.7
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Controls     1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/APM/APMSubFrameComponentSummary.qml b/src/AutoPilotPlugins/APM/APMSubFrameComponentSummary.qml
index 041c728808e447587dd7ec513935b8e6353d175b..9403b3eb0e06078e8cc36f6ca97fbb525baf44e4 100644
--- a/src/AutoPilotPlugins/APM/APMSubFrameComponentSummary.qml
+++ b/src/AutoPilotPlugins/APM/APMSubFrameComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/AutoPilotPlugins/APM/APMTuningComponentCopter.qml b/src/AutoPilotPlugins/APM/APMTuningComponentCopter.qml
index 314a4fa2bf47e7947d01dc149bc1531e7119741f..64faea8acc0fd1d4a2d6c99b2ee25b7e2e6141eb 100644
--- a/src/AutoPilotPlugins/APM/APMTuningComponentCopter.qml
+++ b/src/AutoPilotPlugins/APM/APMTuningComponentCopter.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick              2.7
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Controls     1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/Common/ESP8266Component.qml b/src/AutoPilotPlugins/Common/ESP8266Component.qml
index 90fc2d60187e5980dfdb3aad30bd9d1781b7ed9e..fb5324ed8fc23d2636bb0db6a9cd47010eae0a01 100644
--- a/src/AutoPilotPlugins/Common/ESP8266Component.qml
+++ b/src/AutoPilotPlugins/Common/ESP8266Component.qml
@@ -8,10 +8,10 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
-import QtQuick.Layouts  1.3
+import QtQuick.Layouts  1.2
 
 import QGroundControl               1.0
 import QGroundControl.FactSystem    1.0
diff --git a/src/AutoPilotPlugins/Common/ESP8266ComponentSummary.qml b/src/AutoPilotPlugins/Common/ESP8266ComponentSummary.qml
index db6b7588b864fef78dbaed255164374c5c5cc089..57f60c4dcdf6a5e7b7d969d77316117d97443493 100644
--- a/src/AutoPilotPlugins/Common/ESP8266ComponentSummary.qml
+++ b/src/AutoPilotPlugins/Common/ESP8266ComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/Common/MixersComponent.qml b/src/AutoPilotPlugins/Common/MixersComponent.qml
index 9dcea5dec8b0661a64102cb70c2b9066bb855c4e..e628ba5bec06962432dcd75bfd8ed64bfe60c989 100644
--- a/src/AutoPilotPlugins/Common/MixersComponent.qml
+++ b/src/AutoPilotPlugins/Common/MixersComponent.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick              2.7
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Controls     1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/Common/MotorComponent.qml b/src/AutoPilotPlugins/Common/MotorComponent.qml
index b2e9a29a2f75730aa202add1e5824f1d3308d4df..dc36a82987cdf1a0d009b3c8c518a15771887561 100644
--- a/src/AutoPilotPlugins/Common/MotorComponent.qml
+++ b/src/AutoPilotPlugins/Common/MotorComponent.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl               1.0
diff --git a/src/AutoPilotPlugins/Common/RadioComponent.qml b/src/AutoPilotPlugins/Common/RadioComponent.qml
index 5c9b522ab16ab350164ef5856bd4b7a4742c1fa8..3d08aa1b471a891427ddf215a3fbb0a28a1637b7 100644
--- a/src/AutoPilotPlugins/Common/RadioComponent.qml
+++ b/src/AutoPilotPlugins/Common/RadioComponent.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl               1.0
diff --git a/src/AutoPilotPlugins/Common/SetupPage.qml b/src/AutoPilotPlugins/Common/SetupPage.qml
index 3a46d80a37a13cd9f313f457df84db6d6ff35674..a781de9909dcead1d73d4da6239284da497991ec 100644
--- a/src/AutoPilotPlugins/Common/SetupPage.qml
+++ b/src/AutoPilotPlugins/Common/SetupPage.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl               1.0
diff --git a/src/AutoPilotPlugins/PX4/AirframeComponent.qml b/src/AutoPilotPlugins/PX4/AirframeComponent.qml
index 6dd546a34f930afa2582bbae4ef67205bf67d449..a0920cf22a47e2f9abb70edfea5a7f74a873f182 100644
--- a/src/AutoPilotPlugins/PX4/AirframeComponent.qml
+++ b/src/AutoPilotPlugins/PX4/AirframeComponent.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 import QtQuick.Dialogs 1.2
 
diff --git a/src/AutoPilotPlugins/PX4/AirframeComponentSummary.qml b/src/AutoPilotPlugins/PX4/AirframeComponentSummary.qml
index cb298cbf47503007ecf75f65c0279655132f2fb5..5dd0f980caabef13f91f11fcf49c821b36815852 100644
--- a/src/AutoPilotPlugins/PX4/AirframeComponentSummary.qml
+++ b/src/AutoPilotPlugins/PX4/AirframeComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/AutoPilotPlugins/PX4/CameraComponent.qml b/src/AutoPilotPlugins/PX4/CameraComponent.qml
index 282a79426e2a8f1fe94e55ab38893a2611d97a44..266a7a4c868e813fe4fbe1ede96c2a1bb419f445 100644
--- a/src/AutoPilotPlugins/PX4/CameraComponent.qml
+++ b/src/AutoPilotPlugins/PX4/CameraComponent.qml
@@ -8,10 +8,10 @@
  ****************************************************************************/
 
 
-import QtQuick                      2.7
-import QtQuick.Controls             1.4
+import QtQuick                      2.3
+import QtQuick.Controls             1.2
 import QtQuick.Controls.Styles      1.4
-import QtQuick.Layouts              1.3
+import QtQuick.Layouts              1.2
 import QtGraphicalEffects           1.0
 
 import QGroundControl               1.0
diff --git a/src/AutoPilotPlugins/PX4/CameraComponentSummary.qml b/src/AutoPilotPlugins/PX4/CameraComponentSummary.qml
index cedff9183efaea529d774446bfc598093bdeef07..d475a6600bfc7be1d99b6e5bfe66ee892479a055 100644
--- a/src/AutoPilotPlugins/PX4/CameraComponentSummary.qml
+++ b/src/AutoPilotPlugins/PX4/CameraComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/AutoPilotPlugins/PX4/FlightModesComponentSummary.qml b/src/AutoPilotPlugins/PX4/FlightModesComponentSummary.qml
index d6057d4df75cd69156b72467b60087556e1eb106..e58bc7e97c21077d19c1ee35cb0f4a2b95bf7138 100644
--- a/src/AutoPilotPlugins/PX4/FlightModesComponentSummary.qml
+++ b/src/AutoPilotPlugins/PX4/FlightModesComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/PX4/PX4AdvancedFlightModes.qml b/src/AutoPilotPlugins/PX4/PX4AdvancedFlightModes.qml
index fbebba083d1d85df9aea3d1308a9a084a6bad4be..1abe5caf876aa5e6beaec9998fd9e10e686a109e 100644
--- a/src/AutoPilotPlugins/PX4/PX4AdvancedFlightModes.qml
+++ b/src/AutoPilotPlugins/PX4/PX4AdvancedFlightModes.qml
@@ -8,11 +8,11 @@
  ****************************************************************************/
 
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
-import QtQuick.Layouts          1.3
+import QtQuick.Layouts          1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/PX4/PX4FlightModes.qml b/src/AutoPilotPlugins/PX4/PX4FlightModes.qml
index 555ef689a88b4d2b8e120ac61e4b56c5cfccf89e..68472e8f37340a5d7fba13f28dcce7608c7aa8c6 100644
--- a/src/AutoPilotPlugins/PX4/PX4FlightModes.qml
+++ b/src/AutoPilotPlugins/PX4/PX4FlightModes.qml
@@ -8,11 +8,11 @@
  ****************************************************************************/
 
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
-import QtQuick.Layouts          1.3
+import QtQuick.Layouts          1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/PX4/PX4RadioComponentSummary.qml b/src/AutoPilotPlugins/PX4/PX4RadioComponentSummary.qml
index 9b5cca62e151b35db2f55542ac5055cd4fe8e5fc..1c36cc09223e1a47c274a775fcf2a41d9ea9eee9 100644
--- a/src/AutoPilotPlugins/PX4/PX4RadioComponentSummary.qml
+++ b/src/AutoPilotPlugins/PX4/PX4RadioComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/AutoPilotPlugins/PX4/PX4SimpleFlightModes.qml b/src/AutoPilotPlugins/PX4/PX4SimpleFlightModes.qml
index 73fd7014ea1db14c8b191f4e282b15e1277d2f3d..ae77d193d9a63212cdc64fbf4923b5588bd34e7e 100644
--- a/src/AutoPilotPlugins/PX4/PX4SimpleFlightModes.qml
+++ b/src/AutoPilotPlugins/PX4/PX4SimpleFlightModes.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/PX4/PX4TuningComponentCopter.qml b/src/AutoPilotPlugins/PX4/PX4TuningComponentCopter.qml
index 25e3cf261b1f8c2111462d486ddf1b710817aaaa..ef2c32ce3f48f31ad4b315b35c47f6943421c644 100644
--- a/src/AutoPilotPlugins/PX4/PX4TuningComponentCopter.qml
+++ b/src/AutoPilotPlugins/PX4/PX4TuningComponentCopter.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick              2.7
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Controls     1.2
 
 import QGroundControl.Controls  1.0
 
diff --git a/src/AutoPilotPlugins/PX4/PX4TuningComponentPlane.qml b/src/AutoPilotPlugins/PX4/PX4TuningComponentPlane.qml
index d85d3dbd630494b1fa037dabb259352c69d7f7d3..525a2dc9ee93f5924662d2620d6b8a221390e3a6 100644
--- a/src/AutoPilotPlugins/PX4/PX4TuningComponentPlane.qml
+++ b/src/AutoPilotPlugins/PX4/PX4TuningComponentPlane.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick              2.7
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Controls     1.2
 
 import QGroundControl.Controls  1.0
 
diff --git a/src/AutoPilotPlugins/PX4/PX4TuningComponentVTOL.qml b/src/AutoPilotPlugins/PX4/PX4TuningComponentVTOL.qml
index ccfa5a3b8da4b64b1113494e74fa5e2fd83fb38b..8523a91617c95d4647de883726046a103ef72281 100644
--- a/src/AutoPilotPlugins/PX4/PX4TuningComponentVTOL.qml
+++ b/src/AutoPilotPlugins/PX4/PX4TuningComponentVTOL.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick              2.7
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Controls     1.2
 
 import QGroundControl.Controls  1.0
 
diff --git a/src/AutoPilotPlugins/PX4/PowerComponent.qml b/src/AutoPilotPlugins/PX4/PowerComponent.qml
index d54aa61fd974d7cd6cfaa3b27bedbb3e45a7a849..7b7bc5c4178eda02c18253df9bee8f0d16eb9d8c 100644
--- a/src/AutoPilotPlugins/PX4/PowerComponent.qml
+++ b/src/AutoPilotPlugins/PX4/PowerComponent.qml
@@ -7,10 +7,10 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
-import QtQuick.Layouts  1.3
+import QtQuick.Layouts  1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/AutoPilotPlugins/PX4/PowerComponentSummary.qml b/src/AutoPilotPlugins/PX4/PowerComponentSummary.qml
index 909d571bf66fcc6f73e69a7c52663cd9bb394c35..7991e829f4a2b9abc5795a277786b3301d328f20 100644
--- a/src/AutoPilotPlugins/PX4/PowerComponentSummary.qml
+++ b/src/AutoPilotPlugins/PX4/PowerComponentSummary.qml
@@ -12,8 +12,8 @@
 ///     @brief Battery, propeller and magnetometer summary
 ///     @author Gus Grubba <mavlink@grubba.com>
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/AutoPilotPlugins/PX4/SafetyComponent.qml b/src/AutoPilotPlugins/PX4/SafetyComponent.qml
index 66ccedf57b54551aeafe97733609e53e397cb41b..f15c98e7a1ae2fb64a4e1a416d55a93db83788a5 100644
--- a/src/AutoPilotPlugins/PX4/SafetyComponent.qml
+++ b/src/AutoPilotPlugins/PX4/SafetyComponent.qml
@@ -8,10 +8,10 @@
  ****************************************************************************/
 
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
-import QtQuick.Layouts          1.3
+import QtQuick.Layouts          1.2
 import QtGraphicalEffects       1.0
 
 import QGroundControl.FactSystem    1.0
diff --git a/src/AutoPilotPlugins/PX4/SafetyComponentSummary.qml b/src/AutoPilotPlugins/PX4/SafetyComponentSummary.qml
index 0744e1f9838a55a25665f0fc0ab7ea06ce891bc3..cb51780cc684c49fe077f0a337ce9266c026e256 100644
--- a/src/AutoPilotPlugins/PX4/SafetyComponentSummary.qml
+++ b/src/AutoPilotPlugins/PX4/SafetyComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/AutoPilotPlugins/PX4/SensorsComponent.qml b/src/AutoPilotPlugins/PX4/SensorsComponent.qml
index 9018f733e3ad768a402a561d3cb60563807e15c3..5de13849c6a51dab14e37a0507f94f03eca06f01 100644
--- a/src/AutoPilotPlugins/PX4/SensorsComponent.qml
+++ b/src/AutoPilotPlugins/PX4/SensorsComponent.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 import QtQuick.Dialogs 1.2
 
diff --git a/src/AutoPilotPlugins/PX4/SensorsComponentSummary.qml b/src/AutoPilotPlugins/PX4/SensorsComponentSummary.qml
index 751bc222808a076dd96a620338cc09633e850a74..675ea9426bc329acae534a810541c944659ccfc9 100644
--- a/src/AutoPilotPlugins/PX4/SensorsComponentSummary.qml
+++ b/src/AutoPilotPlugins/PX4/SensorsComponentSummary.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 
 import QGroundControl.FactSystem 1.0
diff --git a/src/AutoPilotPlugins/PX4/SensorsComponentSummaryFixedWing.qml b/src/AutoPilotPlugins/PX4/SensorsComponentSummaryFixedWing.qml
index 711ff75cf142d667e288059851ea872866dc41f6..760a75f9bd30edf6ef9636161ba77b8fc850e868 100644
--- a/src/AutoPilotPlugins/PX4/SensorsComponentSummaryFixedWing.qml
+++ b/src/AutoPilotPlugins/PX4/SensorsComponentSummaryFixedWing.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
diff --git a/src/FactSystem/FactControls/FactBitmask.qml b/src/FactSystem/FactControls/FactBitmask.qml
index 6e970829ee65cedf503e78c97a1a22887c14e279..11efcba86fc5f1621082af8ef30ca732e7a76536 100644
--- a/src/FactSystem/FactControls/FactBitmask.qml
+++ b/src/FactSystem/FactControls/FactBitmask.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.Palette       1.0
diff --git a/src/FactSystem/FactControls/FactCheckBox.qml b/src/FactSystem/FactControls/FactCheckBox.qml
index 3f9cd2eee463db0c9b9296464905fdfd99cebde6..d830e2f83e9f10185cf3a62378433838db99e283 100644
--- a/src/FactSystem/FactControls/FactCheckBox.qml
+++ b/src/FactSystem/FactControls/FactCheckBox.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 
 import QGroundControl.FactSystem 1.0
diff --git a/src/FactSystem/FactControls/FactComboBox.qml b/src/FactSystem/FactControls/FactComboBox.qml
index 9ab25c77ab134bcd28c4cdf2b935dc9708c685b0..1afe2cbf91b5fb5aa4d60dc7cd810110a1a9e4da 100644
--- a/src/FactSystem/FactControls/FactComboBox.qml
+++ b/src/FactSystem/FactControls/FactComboBox.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 
 import QGroundControl.FactSystem 1.0
diff --git a/src/FactSystem/FactControls/FactLabel.qml b/src/FactSystem/FactControls/FactLabel.qml
index d1c7e02eaab25dc8ae74be722f5aa98913ff9291..e44fef7e0c0259bffc862d425491d75697fc068f 100644
--- a/src/FactSystem/FactControls/FactLabel.qml
+++ b/src/FactSystem/FactControls/FactLabel.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 
 import QGroundControl.FactSystem 1.0
diff --git a/src/FactSystem/FactControls/FactPanel.qml b/src/FactSystem/FactControls/FactPanel.qml
index 3c72bc9585e6cc4ee12f976a4a7b6629021a4a7a..43aadeff9c0efc95446c63c4c192e1219f5a95ff 100644
--- a/src/FactSystem/FactControls/FactPanel.qml
+++ b/src/FactSystem/FactControls/FactPanel.qml
@@ -11,8 +11,8 @@
 /// @file
 ///     @author Don Gagne <don@thegagnes.com>
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.FactSystem 1.0
 import QGroundControl.Controls 1.0
diff --git a/src/FactSystem/FactControls/FactTextField.qml b/src/FactSystem/FactControls/FactTextField.qml
index 4f4f032a8e06dc73e9454b19ef9165969b041b9b..a4214a1ad72917b493de5c26fa95f5f661422194 100644
--- a/src/FactSystem/FactControls/FactTextField.qml
+++ b/src/FactSystem/FactControls/FactTextField.qml
@@ -1,5 +1,5 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
 
diff --git a/src/FactSystem/FactControls/FactTextFieldGrid.qml b/src/FactSystem/FactControls/FactTextFieldGrid.qml
index 3d21daeb1cbdfdb85c2200e50e7a781e1980647c..dee0c22368d071d8d020e48c1e27b1f41af8d4a5 100644
--- a/src/FactSystem/FactControls/FactTextFieldGrid.qml
+++ b/src/FactSystem/FactControls/FactTextFieldGrid.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Layouts  1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.Controls      1.0
diff --git a/src/FactSystem/FactControls/FactTextFieldRow.qml b/src/FactSystem/FactControls/FactTextFieldRow.qml
index 704317e0d91ab0744c06c94e44ab803892611807..701e6bd52eebc02572fa3210aa74d6b0cf028bd4 100644
--- a/src/FactSystem/FactControls/FactTextFieldRow.qml
+++ b/src/FactSystem/FactControls/FactTextFieldRow.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Layouts  1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.Controls      1.0
diff --git a/src/FactSystem/FactSystemTest.qml b/src/FactSystem/FactSystemTest.qml
index 6d35e3c655c682b4dd646893ea441b590f00f175..c7c696d92424c45efd97fe49b3836e7c9c2e43a4 100644
--- a/src/FactSystem/FactSystemTest.qml
+++ b/src/FactSystem/FactSystemTest.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QGroundControl.FactSystem 1.0
 import QGroundControl.FactControls 1.0
 
diff --git a/src/FirmwarePlugin/APM/APMSensorParams.qml b/src/FirmwarePlugin/APM/APMSensorParams.qml
index c3c62355a43bc5420ce726fb4c41fc8be05b9d2b..18a73b9e313abdbcd3b8f5efe5ffab4cb52191a0 100644
--- a/src/FirmwarePlugin/APM/APMSensorParams.qml
+++ b/src/FirmwarePlugin/APM/APMSensorParams.qml
@@ -7,7 +7,7 @@
  *
  ****************************************************************************/
 
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl.FactSystem 1.0
 
diff --git a/src/FirmwarePlugin/APM/CopterGeoFenceEditor.qml b/src/FirmwarePlugin/APM/CopterGeoFenceEditor.qml
index feddf1c42c1b10440f46278ced438b22039b1df0..a07ead19404e0ed84e41baf7b073ca80a0d34e20 100644
--- a/src/FirmwarePlugin/APM/CopterGeoFenceEditor.qml
+++ b/src/FirmwarePlugin/APM/CopterGeoFenceEditor.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/FirmwarePlugin/APM/PlaneGeoFenceEditor.qml b/src/FirmwarePlugin/APM/PlaneGeoFenceEditor.qml
index 21c0148e1700a91f1b6659df0479f1bee75561c7..d3a954b9a610ff1e74d75aec279d62ff73711298 100644
--- a/src/FirmwarePlugin/APM/PlaneGeoFenceEditor.qml
+++ b/src/FirmwarePlugin/APM/PlaneGeoFenceEditor.qml
@@ -1,6 +1,6 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/FirmwarePlugin/NoGeoFenceEditor.qml b/src/FirmwarePlugin/NoGeoFenceEditor.qml
index e6a2b99d4737ef9664574395f61111251cacd8a2..e324f7779429fd87ab834273442a0b7b92926b31 100644
--- a/src/FirmwarePlugin/NoGeoFenceEditor.qml
+++ b/src/FirmwarePlugin/NoGeoFenceEditor.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/FirmwarePlugin/PX4/PX4GeoFenceEditor.qml b/src/FirmwarePlugin/PX4/PX4GeoFenceEditor.qml
index f8670dbe556f5e0a3f8b2e9ebcf37d57682d3d4d..cc556100aa585ebe7588e6a022df47638c263d5f 100644
--- a/src/FirmwarePlugin/PX4/PX4GeoFenceEditor.qml
+++ b/src/FirmwarePlugin/PX4/PX4GeoFenceEditor.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/FlightDisplay/FlightDisplayView.qml b/src/FlightDisplay/FlightDisplayView.qml
index c099bddea8bc1447f5e8889c16372bc4985b672b..1000a4d3965a33468a92913e091f58af854dffe7 100644
--- a/src/FlightDisplay/FlightDisplayView.qml
+++ b/src/FlightDisplay/FlightDisplayView.qml
@@ -8,13 +8,13 @@
  ****************************************************************************/
 
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
-import QtLocation               5.6
-import QtPositioning            5.5
-import QtMultimedia             5.8
+import QtLocation               5.3
+import QtPositioning            5.3
+import QtMultimedia             5.5
 
 import QGroundControl               1.0
 import QGroundControl.FlightDisplay 1.0
diff --git a/src/FlightDisplay/FlightDisplayViewDummy.qml b/src/FlightDisplay/FlightDisplayViewDummy.qml
index b53a99e3b23c4d2f3ec728d8cb04a636b1020da4..5e9250d6812afb1ab1cc781d24376b3d6836d20a 100644
--- a/src/FlightDisplay/FlightDisplayViewDummy.qml
+++ b/src/FlightDisplay/FlightDisplayViewDummy.qml
@@ -7,7 +7,7 @@
  *
  ****************************************************************************/
 
-import QtQuick                  2.7
+import QtQuick                  2.3
 
 Rectangle {
     anchors.fill:               parent
diff --git a/src/FlightDisplay/FlightDisplayViewMap.qml b/src/FlightDisplay/FlightDisplayViewMap.qml
index 3eb5c47fd9053f2d9654ff1a2ad44c494db255bd..d76bb792744a63658fde1b07587cd090a9e9578b 100644
--- a/src/FlightDisplay/FlightDisplayViewMap.qml
+++ b/src/FlightDisplay/FlightDisplayViewMap.qml
@@ -8,10 +8,10 @@
  ****************************************************************************/
 
 
-import QtQuick                      2.7
-import QtQuick.Controls             1.4
-import QtLocation                   5.6
-import QtPositioning                5.5
+import QtQuick                      2.3
+import QtQuick.Controls             1.2
+import QtLocation                   5.3
+import QtPositioning                5.3
 
 import QGroundControl               1.0
 import QGroundControl.FlightDisplay 1.0
diff --git a/src/FlightDisplay/FlightDisplayViewUVC.qml b/src/FlightDisplay/FlightDisplayViewUVC.qml
index bb011c55087aff894d067da052e71c745843b2ce..10b768a8c6f6b8e1cac7780f601a248521b2af26 100644
--- a/src/FlightDisplay/FlightDisplayViewUVC.qml
+++ b/src/FlightDisplay/FlightDisplayViewUVC.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick                  2.7
-import QtMultimedia             5.8
+import QtQuick                  2.3
+import QtMultimedia             5.5
 
 import QGroundControl           1.0
 
diff --git a/src/FlightDisplay/FlightDisplayViewVideo.qml b/src/FlightDisplay/FlightDisplayViewVideo.qml
index 454360ba01cd8c32078bb930ba3bb997c4308221..958723498d7389a05893f86f6bf0202c5bf21727 100644
--- a/src/FlightDisplay/FlightDisplayViewVideo.qml
+++ b/src/FlightDisplay/FlightDisplayViewVideo.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick                      2.7
-import QtQuick.Controls             1.4
+import QtQuick                      2.3
+import QtQuick.Controls             1.2
 
 import QGroundControl               1.0
 import QGroundControl.FlightDisplay 1.0
diff --git a/src/FlightDisplay/FlightDisplayViewWidgets.qml b/src/FlightDisplay/FlightDisplayViewWidgets.qml
index 3b3f41d6ee6ca062248180a285218dc523553e84..952c07eaecbee078789327edf65810f1d621db4a 100644
--- a/src/FlightDisplay/FlightDisplayViewWidgets.qml
+++ b/src/FlightDisplay/FlightDisplayViewWidgets.qml
@@ -8,12 +8,12 @@
  ****************************************************************************/
 
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
-import QtLocation               5.6
-import QtPositioning            5.5
+import QtLocation               5.3
+import QtPositioning            5.3
 
 import QGroundControl                           1.0
 import QGroundControl.ScreenTools               1.0
diff --git a/src/FlightDisplay/MultiVehicleList.qml b/src/FlightDisplay/MultiVehicleList.qml
index 15cb3f9e1bf5fceaa6e2b70d949f8413e6fd039e..3928f36ca59ae9f29d670050ea0e9f4c3a8fb91e 100644
--- a/src/FlightDisplay/MultiVehicleList.qml
+++ b/src/FlightDisplay/MultiVehicleList.qml
@@ -7,9 +7,9 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/FlightDisplay/VirtualJoystick.qml b/src/FlightDisplay/VirtualJoystick.qml
index c5e4fa70d5cefb06ed72e2af7b9b710710a08227..e49cd21227afea0dac16e3ca6bd3bae2377840c9 100644
--- a/src/FlightDisplay/VirtualJoystick.qml
+++ b/src/FlightDisplay/VirtualJoystick.qml
@@ -8,7 +8,7 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/FlightMap/FlightMap.qml b/src/FlightMap/FlightMap.qml
index 3192baeffdd5ca9bf17d040f53987b14e61936b2..6204540d57b09158b922a244d3999dd7475d634b 100644
--- a/src/FlightMap/FlightMap.qml
+++ b/src/FlightMap/FlightMap.qml
@@ -14,10 +14,10 @@
  *   @author Gus Grubba <mavlink@grubba.com>
  */
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtLocation       5.6
-import QtPositioning    5.5
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtLocation       5.3
+import QtPositioning    5.3
 
 import QGroundControl                       1.0
 import QGroundControl.FactSystem            1.0
diff --git a/src/FlightMap/MapItems/MissionItemIndicator.qml b/src/FlightMap/MapItems/MissionItemIndicator.qml
index 016891b8fe504289f60962e4cb1ace5413d8e7b5..2130d68fe3f589b3b45818ceebdb25866490efca 100644
--- a/src/FlightMap/MapItems/MissionItemIndicator.qml
+++ b/src/FlightMap/MapItems/MissionItemIndicator.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick      2.7
-import QtLocation   5.6
+import QtQuick      2.3
+import QtLocation   5.3
 
 import QGroundControl.ScreenTools   1.0
 import QGroundControl.Controls      1.0
diff --git a/src/FlightMap/MapItems/MissionItemIndicatorDrag.qml b/src/FlightMap/MapItems/MissionItemIndicatorDrag.qml
index cfda94fda08aaef0ba658eb95a8a1238c2da99a8..d9b3d5e2b535bc1c59f0373a9f30e76b0c47c825 100644
--- a/src/FlightMap/MapItems/MissionItemIndicatorDrag.qml
+++ b/src/FlightMap/MapItems/MissionItemIndicatorDrag.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick      2.7
-import QtLocation   5.6
+import QtQuick      2.3
+import QtLocation   5.3
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/FlightMap/MapItems/MissionItemView.qml b/src/FlightMap/MapItems/MissionItemView.qml
index fa0a8810c40495eb05413e0ab0f19781b62bd590..3ee6a129ca9ea847c6d13de5c2e6e329b7a91ab8 100644
--- a/src/FlightMap/MapItems/MissionItemView.qml
+++ b/src/FlightMap/MapItems/MissionItemView.qml
@@ -8,11 +8,11 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
-import QtLocation       5.6
-import QtPositioning    5.5
+import QtLocation       5.3
+import QtPositioning    5.3
 
 import QGroundControl               1.0
 import QGroundControl.FlightMap     1.0
diff --git a/src/FlightMap/MapItems/MissionLineView.qml b/src/FlightMap/MapItems/MissionLineView.qml
index 959ac1bb73f5de86055aa28373023261025a81d4..5489bebc3406c997565cc780bb0740f3ea87c5de 100644
--- a/src/FlightMap/MapItems/MissionLineView.qml
+++ b/src/FlightMap/MapItems/MissionLineView.qml
@@ -8,9 +8,9 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtLocation       5.6
-import QtPositioning    5.5
+import QtQuick          2.3
+import QtLocation       5.3
+import QtPositioning    5.3
 
 import QGroundControl           1.0
 import QGroundControl.Palette   1.0
diff --git a/src/FlightMap/MapItems/PolygonEditor.qml b/src/FlightMap/MapItems/PolygonEditor.qml
index a3cba825cbd595c805ffb3306e96f753ca0f5073..8935606baaed1a82b71655afac722a557cf6624d 100644
--- a/src/FlightMap/MapItems/PolygonEditor.qml
+++ b/src/FlightMap/MapItems/PolygonEditor.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick      2.7
-import QtLocation   5.6
+import QtQuick      2.3
+import QtLocation   5.3
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
@@ -69,8 +69,8 @@ Item {
         adjustingPolygon = true
         for (var i=0; i<vertexCoordinates.length; i++) {
             var dragItem = Qt.createQmlObject(
-                        "import QtQuick                     2.7; " +
-                        "import QtLocation                  5.6; " +
+                        "import QtQuick                     2.3; " +
+                        "import QtLocation                  5.3; " +
                         "import QGroundControl.ScreenTools  1.0; " +
                         "" +
                         "Rectangle {" +
diff --git a/src/FlightMap/MapItems/VehicleMapItem.qml b/src/FlightMap/MapItems/VehicleMapItem.qml
index c0b5b7c5fa2f6f42f6fc6548dff6c2ed0cbce150..e1e6bfddbafcfa60ccd0dff4e168c1a63ca8550a 100644
--- a/src/FlightMap/MapItems/VehicleMapItem.qml
+++ b/src/FlightMap/MapItems/VehicleMapItem.qml
@@ -11,9 +11,9 @@
 /// @file
 ///     @author Don Gagne <don@thegagnes.com>
 
-import QtQuick          2.7
-import QtLocation       5.6
-import QtPositioning    5.5
+import QtQuick          2.3
+import QtLocation       5.3
+import QtPositioning    5.3
 
 import QGroundControl.ScreenTools   1.0
 import QGroundControl.Vehicle       1.0
diff --git a/src/FlightMap/MapScale.qml b/src/FlightMap/MapScale.qml
index 46ad0f33f44c65148a4de76c160eafc6a7ca9c55..9934a2b7355f984d826f13039d03c234781f426e 100644
--- a/src/FlightMap/MapScale.qml
+++ b/src/FlightMap/MapScale.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl                   1.0
 import QGroundControl.Controls          1.0
diff --git a/src/FlightMap/QGCVideoBackground.qml b/src/FlightMap/QGCVideoBackground.qml
index ba1ee9f08ebc1902c80d5b33c6d250e42346d939..ee264f6a07f572bedbc0c3362379800db6bdbf1b 100644
--- a/src/FlightMap/QGCVideoBackground.qml
+++ b/src/FlightMap/QGCVideoBackground.qml
@@ -14,8 +14,8 @@
  *   @author Gus Grubba <mavlink@grubba.com>
  */
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QGroundControl.QgcQtGStreamer 1.0
 
 VideoItem {
diff --git a/src/FlightMap/Widgets/CameraWidget.qml b/src/FlightMap/Widgets/CameraWidget.qml
index 8f3aa7724bb801c95cafeddda75bb11b7fed4c3e..080bfd372d44fab41af788e97bc80de6f9574a3c 100644
--- a/src/FlightMap/Widgets/CameraWidget.qml
+++ b/src/FlightMap/Widgets/CameraWidget.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Layouts  1.2
 
 import QGroundControl               1.0
 import QGroundControl.Controls      1.0
diff --git a/src/FlightMap/Widgets/CenterMapDropButton.qml b/src/FlightMap/Widgets/CenterMapDropButton.qml
index 67c8bb0ee3d5bb5f5838ea69ba76b2f40598b4bf..2965f48e4d917914c0bd28555ef57ec2624e8f74 100644
--- a/src/FlightMap/Widgets/CenterMapDropButton.qml
+++ b/src/FlightMap/Widgets/CenterMapDropButton.qml
@@ -7,10 +7,10 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
-import QtPositioning    5.5
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
+import QtPositioning    5.3
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/FlightMap/Widgets/CenterMapDropPanel.qml b/src/FlightMap/Widgets/CenterMapDropPanel.qml
index ac14217b6e8b12e3383c9221488381818a3c4df9..59652180c2d8b5b61138235070b381024939699a 100644
--- a/src/FlightMap/Widgets/CenterMapDropPanel.qml
+++ b/src/FlightMap/Widgets/CenterMapDropPanel.qml
@@ -7,10 +7,10 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
-import QtPositioning    5.5
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
+import QtPositioning    5.3
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/FlightMap/Widgets/CompassRing.qml b/src/FlightMap/Widgets/CompassRing.qml
index 440174df423bbec6ac7cd712a9045a86acd5149f..b6c74ed2dd195839c4b5e3f6a4f3a803c142002d 100644
--- a/src/FlightMap/Widgets/CompassRing.qml
+++ b/src/FlightMap/Widgets/CompassRing.qml
@@ -7,7 +7,7 @@
  *
  ****************************************************************************/
 
-import QtQuick              2.7
+import QtQuick              2.3
 import QtGraphicalEffects   1.0
 
 import QGroundControl.Controls      1.0
diff --git a/src/FlightMap/Widgets/InstrumentSwipeView.qml b/src/FlightMap/Widgets/InstrumentSwipeView.qml
index cea7f46a0bd41ec969a06e9ec676cc57dd3d9b57..a1eaf5f408f3a259ee5e7e47d4036292f2142661 100644
--- a/src/FlightMap/Widgets/InstrumentSwipeView.qml
+++ b/src/FlightMap/Widgets/InstrumentSwipeView.qml
@@ -1,6 +1,6 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
-import QtQuick.Layouts          1.3
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
+import QtQuick.Layouts          1.2
 
 import QGroundControl.Palette       1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/FlightMap/Widgets/MapFitFunctions.qml b/src/FlightMap/Widgets/MapFitFunctions.qml
index 155daa8ef1ff85e12fbdc19aeee19ca4f00ade5a..698388788ec346b8ec30fae18336607ac36380cb 100644
--- a/src/FlightMap/Widgets/MapFitFunctions.qml
+++ b/src/FlightMap/Widgets/MapFitFunctions.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtPositioning    5.5
+import QtQuick          2.3
+import QtPositioning    5.3
 
 import QGroundControl 1.0
 
diff --git a/src/FlightMap/Widgets/QGCArtificialHorizon.qml b/src/FlightMap/Widgets/QGCArtificialHorizon.qml
index f37dd0cff34b67a3906b3372058a343a729fc242..2165cfb17a3a763cc5e34b3a3bd423848e8f8338 100644
--- a/src/FlightMap/Widgets/QGCArtificialHorizon.qml
+++ b/src/FlightMap/Widgets/QGCArtificialHorizon.qml
@@ -14,7 +14,7 @@
  *   @author Gus Grubba <mavlink@grubba.com>
  */
 
-import QtQuick 2.7
+import QtQuick 2.3
 
 Item {
     id: root
diff --git a/src/FlightMap/Widgets/QGCAttitudeHUD.qml b/src/FlightMap/Widgets/QGCAttitudeHUD.qml
index ac11eb010f9efa99c6a20a0288307c86383d5d49..2afe33d521e5a0d1c5d24b79eb45b2e7a8c46a34 100644
--- a/src/FlightMap/Widgets/QGCAttitudeHUD.qml
+++ b/src/FlightMap/Widgets/QGCAttitudeHUD.qml
@@ -14,7 +14,7 @@
  *   @author Gus Grubba <mavlink@grubba.com>
  */
 
-import QtQuick 2.7
+import QtQuick 2.3
 import QGroundControl.ScreenTools 1.0
 
 Item {
diff --git a/src/FlightMap/Widgets/QGCAttitudeWidget.qml b/src/FlightMap/Widgets/QGCAttitudeWidget.qml
index 0d62241003f1588bff8a9ba5db0b022b3577edc8..ed2803af63fec4b6a0904ec81cce55d8ad7a99ff 100644
--- a/src/FlightMap/Widgets/QGCAttitudeWidget.qml
+++ b/src/FlightMap/Widgets/QGCAttitudeWidget.qml
@@ -14,7 +14,7 @@
  *   @author Gus Grubba <mavlink@grubba.com>
  */
 
-import QtQuick              2.7
+import QtQuick              2.3
 import QtGraphicalEffects   1.0
 
 import QGroundControl               1.0
diff --git a/src/FlightMap/Widgets/QGCCompassWidget.qml b/src/FlightMap/Widgets/QGCCompassWidget.qml
index 431e2a8a26a917788e7152ead301bfdfb14a53aa..1c4b328e60c4babc64f6aab926e3f42ce2a16252 100644
--- a/src/FlightMap/Widgets/QGCCompassWidget.qml
+++ b/src/FlightMap/Widgets/QGCCompassWidget.qml
@@ -14,7 +14,7 @@
  *   @author Gus Grubba <mavlink@grubba.com>
  */
 
-import QtQuick              2.7
+import QtQuick              2.3
 import QtGraphicalEffects   1.0
 
 import QGroundControl.Controls      1.0
diff --git a/src/FlightMap/Widgets/QGCInstrumentWidget.qml b/src/FlightMap/Widgets/QGCInstrumentWidget.qml
index 85039a67f866dc1f8e8992ba305ac9b2c018c8ac..15c7fade96814dad7cd93951a5e701d6f15af626 100644
--- a/src/FlightMap/Widgets/QGCInstrumentWidget.qml
+++ b/src/FlightMap/Widgets/QGCInstrumentWidget.qml
@@ -7,7 +7,7 @@
  *
  ****************************************************************************/
 
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl               1.0
 import QGroundControl.Controls      1.0
diff --git a/src/FlightMap/Widgets/QGCInstrumentWidgetAlternate.qml b/src/FlightMap/Widgets/QGCInstrumentWidgetAlternate.qml
index dec8863372ae947a0756d36db3ff6fd4159db4d1..3bf190a925df117edcfb3afa24e5279e845a074c 100644
--- a/src/FlightMap/Widgets/QGCInstrumentWidgetAlternate.qml
+++ b/src/FlightMap/Widgets/QGCInstrumentWidgetAlternate.qml
@@ -8,7 +8,7 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl               1.0
 import QGroundControl.Controls      1.0
diff --git a/src/FlightMap/Widgets/QGCPitchIndicator.qml b/src/FlightMap/Widgets/QGCPitchIndicator.qml
index c7ca4c81ce84dad20350faa420f53e69edcecd51..6cc61ca13194b48e202bad897522cb57dd6963c5 100644
--- a/src/FlightMap/Widgets/QGCPitchIndicator.qml
+++ b/src/FlightMap/Widgets/QGCPitchIndicator.qml
@@ -14,7 +14,7 @@
  *   @author Gus Grubba <mavlink@grubba.com>
  */
 
-import QtQuick 2.7
+import QtQuick 2.3
 import QGroundControl.ScreenTools 1.0
 import QGroundControl.Controls 1.0
 
diff --git a/src/FlightMap/Widgets/ValuesWidget.qml b/src/FlightMap/Widgets/ValuesWidget.qml
index 46bcea1e3361a8d006770ee18e9409eca0a10c48..f9495390a902b712bc524702e45cc280c6d17ee5 100644
--- a/src/FlightMap/Widgets/ValuesWidget.qml
+++ b/src/FlightMap/Widgets/ValuesWidget.qml
@@ -8,9 +8,9 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
+import QtQuick          2.3
 import QtQuick.Dialogs  1.2
-import QtQuick.Layouts  1.3
+import QtQuick.Layouts  1.2
 
 import QGroundControl.Controls      1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/FlightMap/Widgets/VehicleHealthWidget.qml b/src/FlightMap/Widgets/VehicleHealthWidget.qml
index 680f9cb4a49989455a8ecd85cd1e7715e581bc38..3e7a35c929ad72dbc19c64708d5dd0ea2eb6c27d 100644
--- a/src/FlightMap/Widgets/VehicleHealthWidget.qml
+++ b/src/FlightMap/Widgets/VehicleHealthWidget.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Layouts  1.2
 
 import QGroundControl               1.0
 import QGroundControl.Controls      1.0
diff --git a/src/FlightMap/Widgets/VibrationWidget.qml b/src/FlightMap/Widgets/VibrationWidget.qml
index b24132ebc50a1078c48800f958ff4f5adbc80a70..f5aeff5351714476ee630528ba9cee5d42cfbe1f 100644
--- a/src/FlightMap/Widgets/VibrationWidget.qml
+++ b/src/FlightMap/Widgets/VibrationWidget.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.Controls      1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/MissionEditor/FWLandingPatternEditor.qml b/src/MissionEditor/FWLandingPatternEditor.qml
index 2fbdf09829165e175654bacf89e49a70f3166e7b..fe0e35f104325f084facbc9e5d48648f234fbc19 100644
--- a/src/MissionEditor/FWLandingPatternEditor.qml
+++ b/src/MissionEditor/FWLandingPatternEditor.qml
@@ -7,10 +7,10 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
-import QtQuick.Layouts  1.3
+import QtQuick.Layouts  1.2
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/MissionEditor/FWLandingPatternMapVisual.qml b/src/MissionEditor/FWLandingPatternMapVisual.qml
index 0ccc00b681870a0cc97278d08520706f9c6687e7..48aae1aea21bc64e3fa5ffb42eedc26f483ad26e 100644
--- a/src/MissionEditor/FWLandingPatternMapVisual.qml
+++ b/src/MissionEditor/FWLandingPatternMapVisual.qml
@@ -7,10 +7,10 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtLocation       5.6
-import QtPositioning    5.5
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtLocation       5.3
+import QtPositioning    5.3
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/MissionEditor/GeoFenceEditor.qml b/src/MissionEditor/GeoFenceEditor.qml
index e430dd5db62ac447ee2a84d933aa3ddd042228b5..19aec35e5d2a40e6064b7cc019b47b0a75ed71f3 100644
--- a/src/MissionEditor/GeoFenceEditor.qml
+++ b/src/MissionEditor/GeoFenceEditor.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/MissionEditor/MissionEditor.qml b/src/MissionEditor/MissionEditor.qml
index d3ca1e72c9da13f138fe535bfcb23c0ce795fea9..4c656ae47da54fdc2135345e7cf56122db3e0d0a 100644
--- a/src/MissionEditor/MissionEditor.qml
+++ b/src/MissionEditor/MissionEditor.qml
@@ -8,12 +8,12 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
-import QtLocation       5.6
-import QtPositioning    5.5
-import QtQuick.Layouts  1.3
+import QtLocation       5.3
+import QtPositioning    5.3
+import QtQuick.Layouts  1.2
 
 import QGroundControl               1.0
 import QGroundControl.FlightMap     1.0
diff --git a/src/MissionEditor/MissionItemEditor.qml b/src/MissionEditor/MissionItemEditor.qml
index 913a85ae10eeadcee1caa16465dab36ce139d6f1..2b9942d201b40c3e1006020a89b80e3ed6a51a3a 100644
--- a/src/MissionEditor/MissionItemEditor.qml
+++ b/src/MissionEditor/MissionItemEditor.qml
@@ -1,5 +1,5 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
 
diff --git a/src/MissionEditor/MissionItemMapVisual.qml b/src/MissionEditor/MissionItemMapVisual.qml
index 0508eb757962266aa4952d6646afc1dd71a2251d..b86111a5657c5b988c241d70525b81d31e106a3e 100644
--- a/src/MissionEditor/MissionItemMapVisual.qml
+++ b/src/MissionEditor/MissionItemMapVisual.qml
@@ -7,10 +7,10 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtLocation       5.6
-import QtPositioning    5.5
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtLocation       5.3
+import QtPositioning    5.3
 
 import QGroundControl.ScreenTools   1.0
 import QGroundControl.Palette       1.0
diff --git a/src/MissionEditor/MissionItemStatus.qml b/src/MissionEditor/MissionItemStatus.qml
index 9c508cec6f70e25ffe1c7829fa2d88ff059b2ed0..692a16514c94dd786e2d9c6d8b509125f394083e 100644
--- a/src/MissionEditor/MissionItemStatus.qml
+++ b/src/MissionEditor/MissionItemStatus.qml
@@ -8,9 +8,9 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl.ScreenTools   1.0
 import QGroundControl.Controls      1.0
diff --git a/src/MissionEditor/MissionSettingsEditor.qml b/src/MissionEditor/MissionSettingsEditor.qml
index 337927a2435fbcfb4ec589dfb03e81ab5eabf0b1..e68ec7421e3c52231e782e13f9e2272a4266ba37 100644
--- a/src/MissionEditor/MissionSettingsEditor.qml
+++ b/src/MissionEditor/MissionSettingsEditor.qml
@@ -1,6 +1,6 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl                   1.0
 import QGroundControl.ScreenTools       1.0
diff --git a/src/MissionEditor/QGCMapPolygonControls.qml b/src/MissionEditor/QGCMapPolygonControls.qml
index 11d6a70ab882d8b822d0a528f390b60350aba4a4..114f05bb343ca1d4785ffe195e396bf4e23d5d2d 100644
--- a/src/MissionEditor/QGCMapPolygonControls.qml
+++ b/src/MissionEditor/QGCMapPolygonControls.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.ScreenTools   1.0
 import QGroundControl.Controls      1.0
diff --git a/src/MissionEditor/RallyPointEditorHeader.qml b/src/MissionEditor/RallyPointEditorHeader.qml
index 1f45d9fee885402cda816f4b476437a96647c511..4e271b51af7fc11dc1a765542ae1be9accecddef 100644
--- a/src/MissionEditor/RallyPointEditorHeader.qml
+++ b/src/MissionEditor/RallyPointEditorHeader.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/MissionEditor/RallyPointItemEditor.qml b/src/MissionEditor/RallyPointItemEditor.qml
index ff3805a5b50a29079d3dcda1abf16cfdc8c34ff7..b6b36ed07f547fa4efe43af7c6d1542bd2a9bfcd 100644
--- a/src/MissionEditor/RallyPointItemEditor.qml
+++ b/src/MissionEditor/RallyPointItemEditor.qml
@@ -1,6 +1,6 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl.ScreenTools   1.0
 import QGroundControl.Vehicle       1.0
diff --git a/src/MissionEditor/SimpleItemEditor.qml b/src/MissionEditor/SimpleItemEditor.qml
index b4aa79b792ee787dd5da6b316942d780f18d8443..8ce994eeef98e01c1062d8374ded6871edf4a892 100644
--- a/src/MissionEditor/SimpleItemEditor.qml
+++ b/src/MissionEditor/SimpleItemEditor.qml
@@ -1,8 +1,8 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
-import QtQuick.Layouts          1.3
+import QtQuick.Layouts          1.2
 
 import QGroundControl.ScreenTools   1.0
 import QGroundControl.Vehicle       1.0
diff --git a/src/MissionEditor/SimpleItemMapVisual.qml b/src/MissionEditor/SimpleItemMapVisual.qml
index 0c5708e67e56e8605f82ab5066a4ef1ca1209348..59f6c0acf3714e580e6b59cd4c5f28c2f243f16e 100644
--- a/src/MissionEditor/SimpleItemMapVisual.qml
+++ b/src/MissionEditor/SimpleItemMapVisual.qml
@@ -7,10 +7,10 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtLocation       5.6
-import QtPositioning    5.5
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtLocation       5.3
+import QtPositioning    5.3
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/MissionEditor/SurveyItemEditor.qml b/src/MissionEditor/SurveyItemEditor.qml
index 349e54fb9db2e421227bbe277b5132b72e5a388c..d45c3a797ee0ea15cfc4d184d87f46775563b7e4 100644
--- a/src/MissionEditor/SurveyItemEditor.qml
+++ b/src/MissionEditor/SurveyItemEditor.qml
@@ -1,7 +1,7 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
-import QtQuick.Layouts  1.3
+import QtQuick.Layouts  1.2
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/MissionEditor/SurveyMapVisual.qml b/src/MissionEditor/SurveyMapVisual.qml
index cfbdb092c5772b988d8cea504f0ca8aeea998674..d680520341cd81e9db7a8763e967bc9e3e397abe 100644
--- a/src/MissionEditor/SurveyMapVisual.qml
+++ b/src/MissionEditor/SurveyMapVisual.qml
@@ -7,10 +7,10 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtLocation       5.6
-import QtPositioning    5.5
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtLocation       5.3
+import QtPositioning    5.3
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/MultiVehicle/MultiVehicleView.qml b/src/MultiVehicle/MultiVehicleView.qml
index c7125ffcbf504a32938f48f93acabfa5de07a53e..0637399436bb9c5816554ddfa4bc3e93b0f901fa 100644
--- a/src/MultiVehicle/MultiVehicleView.qml
+++ b/src/MultiVehicle/MultiVehicleView.qml
@@ -7,10 +7,10 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
-import QtQuick.Layouts  1.3
+import QtQuick.Layouts  1.2
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/QmlControls/AppMessages.qml b/src/QmlControls/AppMessages.qml
index 4b2d62a1942b5585d4177cc634b688d670bb2fcb..5362e9d16788eba809097551762e31a2d4ba831d 100644
--- a/src/QmlControls/AppMessages.qml
+++ b/src/QmlControls/AppMessages.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
 
diff --git a/src/QmlControls/ClickableColor.qml b/src/QmlControls/ClickableColor.qml
index 52fc16accff3278e76946db149e35687c20ceb15..69686b9ab970b03d64b8a49cd02530dcf4ce8284 100644
--- a/src/QmlControls/ClickableColor.qml
+++ b/src/QmlControls/ClickableColor.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs 1.2
 
 Rectangle {
diff --git a/src/QmlControls/DropButton.qml b/src/QmlControls/DropButton.qml
index e5f79dbb3f68d99995e62e9c7b944c4254e65291..ceb0cf48a81bc5aeb7934a343e2a103efedd6d3d 100644
--- a/src/QmlControls/DropButton.qml
+++ b/src/QmlControls/DropButton.qml
@@ -1,5 +1,5 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 
 import QGroundControl               1.0
diff --git a/src/QmlControls/DropPanel.qml b/src/QmlControls/DropPanel.qml
index 7c606cf35297daebe6f91b472bd72963a2cc764a..11c00e99ab808926b5709f4d84adfc0dac92c19e 100644
--- a/src/QmlControls/DropPanel.qml
+++ b/src/QmlControls/DropPanel.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 
 import QGroundControl               1.0
diff --git a/src/QmlControls/ExclusiveGroupItem.qml b/src/QmlControls/ExclusiveGroupItem.qml
index 1e7ade2e4ad0989ea5c3d4743f1adc98486e6eac..0e89b8cf4bdb2c788c6ffff6cb5aaa72a5258d61 100644
--- a/src/QmlControls/ExclusiveGroupItem.qml
+++ b/src/QmlControls/ExclusiveGroupItem.qml
@@ -1,5 +1,5 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 
 
 /// The ExclusiveGroupItem control can be used as a base class for a control which
diff --git a/src/QmlControls/FactSliderPanel.qml b/src/QmlControls/FactSliderPanel.qml
index fd9259f7829b24323cad71db0f7f2f26c87afbf2..3ed30f46943d326625d6e8f2472ab4207ed572a4 100644
--- a/src/QmlControls/FactSliderPanel.qml
+++ b/src/QmlControls/FactSliderPanel.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick              2.7
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Controls     1.2
 
 import QGroundControl.FactSystem    1.0
 import QGroundControl.FactControls  1.0
diff --git a/src/QmlControls/FlightModeDropdown.qml b/src/QmlControls/FlightModeDropdown.qml
index d32823edabb81b4d89250dcbaaa5c883fd9a4c42..20766eb6509f9e936f4936be7079587c58e49579 100644
--- a/src/QmlControls/FlightModeDropdown.qml
+++ b/src/QmlControls/FlightModeDropdown.qml
@@ -7,7 +7,7 @@
  *
  ****************************************************************************/
 
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl.Controls      1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/QmlControls/FlightModeMenu.qml b/src/QmlControls/FlightModeMenu.qml
index 35ad1c506f6f3197c02c38ede39a4f5cc7e3e2ba..9b553a3951dc291673923c9c39b5cad861674c7c 100644
--- a/src/QmlControls/FlightModeMenu.qml
+++ b/src/QmlControls/FlightModeMenu.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl               1.0
 import QGroundControl.Controls      1.0
diff --git a/src/QmlControls/GuidedBar.qml b/src/QmlControls/GuidedBar.qml
index 8cad2aad1022a5d6e6241b722ab3723972442c17..c7f03226df8ca518eec24fb8b9df9d49d9681ec3 100644
--- a/src/QmlControls/GuidedBar.qml
+++ b/src/QmlControls/GuidedBar.qml
@@ -7,7 +7,7 @@
  *
  ****************************************************************************/
 
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl               1.0
 import QGroundControl.Controls      1.0
diff --git a/src/QmlControls/IndicatorButton.qml b/src/QmlControls/IndicatorButton.qml
index df924f648bf03097b08ab37fa4b5af5bce7fc85b..c8d33473742a295199c300727f3d7c5c3e117507 100644
--- a/src/QmlControls/IndicatorButton.qml
+++ b/src/QmlControls/IndicatorButton.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.Controls      1.0
 import QGroundControl.Palette       1.0
diff --git a/src/QmlControls/JoystickThumbPad.qml b/src/QmlControls/JoystickThumbPad.qml
index 90e954f0b6b4e67e3145893f5f1719e42baa98f8..5b3e81695005dc9ce33617ff24364d84dc977760 100644
--- a/src/QmlControls/JoystickThumbPad.qml
+++ b/src/QmlControls/JoystickThumbPad.qml
@@ -1,5 +1,5 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 
 import QGroundControl.Palette       1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/QmlControls/MissionCommandDialog.qml b/src/QmlControls/MissionCommandDialog.qml
index b0a73ee8351a755e279d26fa681987023f765635..5320d69f3b17b781b61a6180c233451086beafa4 100644
--- a/src/QmlControls/MissionCommandDialog.qml
+++ b/src/QmlControls/MissionCommandDialog.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 
 import QGroundControl               1.0
 import QGroundControl.Controls      1.0
diff --git a/src/QmlControls/MissionItemIndexLabel.qml b/src/QmlControls/MissionItemIndexLabel.qml
index 746d14d6cf09af5131e003981c61615c0c6b0115..d09cc4c10a48c90bc0fd34610e7f2a310a0b94a4 100644
--- a/src/QmlControls/MissionItemIndexLabel.qml
+++ b/src/QmlControls/MissionItemIndexLabel.qml
@@ -1,5 +1,5 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 
 import QGroundControl.ScreenTools 1.0
diff --git a/src/QmlControls/ModeSwitchDisplay.qml b/src/QmlControls/ModeSwitchDisplay.qml
index 0322c6ac35542d79e5e568b2de55908fe9f9ec37..85a1c104592e5f466e5f70b2959f9cc83794a95c 100644
--- a/src/QmlControls/ModeSwitchDisplay.qml
+++ b/src/QmlControls/ModeSwitchDisplay.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 
 import QGroundControl.Palette 1.0
diff --git a/src/QmlControls/MultiRotorMotorDisplay.qml b/src/QmlControls/MultiRotorMotorDisplay.qml
index cec5646129c7c04da815062d457742e5492ca7f4..647aa1d7ea81fdfc610a554ad15b7221d6db597b 100644
--- a/src/QmlControls/MultiRotorMotorDisplay.qml
+++ b/src/QmlControls/MultiRotorMotorDisplay.qml
@@ -1,4 +1,4 @@
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl.Palette       1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/QmlControls/OfflineMapButton.qml b/src/QmlControls/OfflineMapButton.qml
index 63f391933ca59271bbc063c347a6e9f43991d2f2..8df92397e6b91b04bb14b0caeafb3d9bd1325cfa 100644
--- a/src/QmlControls/OfflineMapButton.qml
+++ b/src/QmlControls/OfflineMapButton.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.Palette       1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/QmlControls/ParameterEditor.qml b/src/QmlControls/ParameterEditor.qml
index 1d1ed8d3cdd2e7d13a408d960ce21668a8862582..a56f3151b1e0f771887803b83ef3cd5f4acba91a 100644
--- a/src/QmlControls/ParameterEditor.qml
+++ b/src/QmlControls/ParameterEditor.qml
@@ -11,8 +11,8 @@
 /// @file
 ///     @author Don Gagne <don@thegagnes.com>
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Dialogs          1.2
 
 import QGroundControl               1.0
diff --git a/src/QmlControls/ParameterEditorDialog.qml b/src/QmlControls/ParameterEditorDialog.qml
index 0614f1064e7adca7d1c04518f1318965feb65363..c36fbf0d15001e37b232481df6d8595c6024c0bc 100644
--- a/src/QmlControls/ParameterEditorDialog.qml
+++ b/src/QmlControls/ParameterEditorDialog.qml
@@ -7,9 +7,9 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl.Controls      1.0
 import QGroundControl.Palette       1.0
diff --git a/src/QmlControls/QGCButton.qml b/src/QmlControls/QGCButton.qml
index 123faa6ab51da2a058ee472cc9c3513a7ba26a90..f9cbe883583a6acd69dcd319a30a09633bb89f35 100644
--- a/src/QmlControls/QGCButton.qml
+++ b/src/QmlControls/QGCButton.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 
 import QGroundControl.Palette 1.0
diff --git a/src/QmlControls/QGCCheckBox.qml b/src/QmlControls/QGCCheckBox.qml
index 6628460e7c63630066000785b075c8e49b67da45..424e244438ea79917e90e2b06d0512608a7b1329 100644
--- a/src/QmlControls/QGCCheckBox.qml
+++ b/src/QmlControls/QGCCheckBox.qml
@@ -1,5 +1,5 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 
 import QGroundControl.Palette       1.0
diff --git a/src/QmlControls/QGCColoredImage.qml b/src/QmlControls/QGCColoredImage.qml
index 455f67c439bf7c73358da0d59c11db62d482ef90..58a0ff2136d4c6de0880788b4a1272165236ec4b 100644
--- a/src/QmlControls/QGCColoredImage.qml
+++ b/src/QmlControls/QGCColoredImage.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 import QtGraphicalEffects 1.0
 
diff --git a/src/QmlControls/QGCComboBox.qml b/src/QmlControls/QGCComboBox.qml
index bd9cf296739ca509a4b19417767ef9e4883a3345..ce734073fed9f8b94f65ea90b421563a938bddc9 100644
--- a/src/QmlControls/QGCComboBox.qml
+++ b/src/QmlControls/QGCComboBox.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 
 import QGroundControl.Palette 1.0
diff --git a/src/QmlControls/QGCFlickable.qml b/src/QmlControls/QGCFlickable.qml
index b7ed79d53b82f1e120bb2b2b6a7a21db47d83df6..c86fd39b1a5dd787c2f614b8b284c3e37c49b62c 100644
--- a/src/QmlControls/QGCFlickable.qml
+++ b/src/QmlControls/QGCFlickable.qml
@@ -1,4 +1,4 @@
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl.Palette 1.0
 
diff --git a/src/QmlControls/QGCFlickableHorizontalIndicator.qml b/src/QmlControls/QGCFlickableHorizontalIndicator.qml
index 35b05c28be7ebe434be90d41133530c9b2886502..46216aa51ce4a3ac1ec2c01f5674c68ec49404ec 100644
--- a/src/QmlControls/QGCFlickableHorizontalIndicator.qml
+++ b/src/QmlControls/QGCFlickableHorizontalIndicator.qml
@@ -1,4 +1,4 @@
-import QtQuick 2.7
+import QtQuick 2.3
 
 Rectangle {
     id:                    horizontalIndicator
diff --git a/src/QmlControls/QGCFlickableVerticalIndicator.qml b/src/QmlControls/QGCFlickableVerticalIndicator.qml
index 4365d1bd6fbe48de3a2089bf22494e5a4d4f3f6c..5844c7dc09a4da5c390b3f7fc45d4f94648a9048 100644
--- a/src/QmlControls/QGCFlickableVerticalIndicator.qml
+++ b/src/QmlControls/QGCFlickableVerticalIndicator.qml
@@ -1,4 +1,4 @@
-import QtQuick 2.7
+import QtQuick 2.3
 
 Rectangle {
     id:                    verticalIndicator
diff --git a/src/QmlControls/QGCGroupBox.qml b/src/QmlControls/QGCGroupBox.qml
index b9570c5c3ac352d22ded31b5770356f9edc1120f..196ef18078dd6c06679d8618b1d8705311f08563 100644
--- a/src/QmlControls/QGCGroupBox.qml
+++ b/src/QmlControls/QGCGroupBox.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 
 import QGroundControl.Palette       1.0
 import QGroundControl.ScreenTools 1.0
diff --git a/src/QmlControls/QGCLabel.qml b/src/QmlControls/QGCLabel.qml
index 56b00aaed9be60741870eafa1e886d63feb30bd1..32176837c8ef2adab8df47ff7790d6c2296c64bc 100644
--- a/src/QmlControls/QGCLabel.qml
+++ b/src/QmlControls/QGCLabel.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 
 import QGroundControl.Palette 1.0
diff --git a/src/QmlControls/QGCListView.qml b/src/QmlControls/QGCListView.qml
index 4f5a447d82a02569372626ff7b619c824be860f4..104bb3cbad4d038b2d83b0c37d5608885bef5986 100644
--- a/src/QmlControls/QGCListView.qml
+++ b/src/QmlControls/QGCListView.qml
@@ -1,4 +1,4 @@
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl.Palette 1.0
 
diff --git a/src/QmlControls/QGCMapLabel.qml b/src/QmlControls/QGCMapLabel.qml
index 8f243f1d74839eeabe139438435169bbc6542ecc..2d5639f551dbc136d640d0e98afe04f9db4453d2 100644
--- a/src/QmlControls/QGCMapLabel.qml
+++ b/src/QmlControls/QGCMapLabel.qml
@@ -1,5 +1,5 @@
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.Controls  1.0
 import QGroundControl.Palette   1.0
diff --git a/src/QmlControls/QGCMobileFileOpenDialog.qml b/src/QmlControls/QGCMobileFileOpenDialog.qml
index a2d9b0f694c0a24dcc6ac97c69d9bbf5edf47687..02873ea714035a2cf8c5737f5a818c801d4d012e 100644
--- a/src/QmlControls/QGCMobileFileOpenDialog.qml
+++ b/src/QmlControls/QGCMobileFileOpenDialog.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl               1.0
diff --git a/src/QmlControls/QGCMobileFileSaveDialog.qml b/src/QmlControls/QGCMobileFileSaveDialog.qml
index 654a35443fa1804c6c4dbfdc6d8d9a9b2310dd2a..cf46485d0ddfd0b9122fdac5709b5d254d748556 100644
--- a/src/QmlControls/QGCMobileFileSaveDialog.qml
+++ b/src/QmlControls/QGCMobileFileSaveDialog.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl               1.0
diff --git a/src/QmlControls/QGCMovableItem.qml b/src/QmlControls/QGCMovableItem.qml
index 8f683ae5141d8b57b0f905cf8924bdf22d849436..3f2b2f9e948c3b7eafd5ed611407df89c5838d51 100644
--- a/src/QmlControls/QGCMovableItem.qml
+++ b/src/QmlControls/QGCMovableItem.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QGroundControl.ScreenTools 1.0
 
 // This item can be dragged around within its parent.
diff --git a/src/QmlControls/QGCPipable.qml b/src/QmlControls/QGCPipable.qml
index a8d7161563c9d0a434ac62a601cadc1a876c384b..2294835a0ec304c1ae5437ef738e9d7c3fb2b832 100644
--- a/src/QmlControls/QGCPipable.qml
+++ b/src/QmlControls/QGCPipable.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick                      2.7
-import QtQuick.Controls             1.4
+import QtQuick                      2.3
+import QtQuick.Controls             1.2
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/QmlControls/QGCRadioButton.qml b/src/QmlControls/QGCRadioButton.qml
index 82578fac43afbdc7a89a5f62adf95c52848268c6..4eba07f153f1cb8bac9e8a0f8261bb8b59577cab 100644
--- a/src/QmlControls/QGCRadioButton.qml
+++ b/src/QmlControls/QGCRadioButton.qml
@@ -1,5 +1,5 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 
 import QGroundControl.Palette       1.0
diff --git a/src/QmlControls/QGCSlider.qml b/src/QmlControls/QGCSlider.qml
index 6da123cef8f06b6feff3dc2682ac77031fb5e290..1bbd2f18ec6fd3c2e128ae929604548f5656a069 100644
--- a/src/QmlControls/QGCSlider.qml
+++ b/src/QmlControls/QGCSlider.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 
 import QGroundControl.Palette       1.0
diff --git a/src/QmlControls/QGCTextField.qml b/src/QmlControls/QGCTextField.qml
index 540e8fd548b0b771b371123e4048b51d81489da5..1c7902135ae0ea48d397dcebc754e4cee7cf720d 100644
--- a/src/QmlControls/QGCTextField.qml
+++ b/src/QmlControls/QGCTextField.qml
@@ -1,7 +1,7 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
-import QtQuick.Layouts          1.3
+import QtQuick.Layouts          1.2
 
 import QGroundControl.Palette       1.0
 import QGroundControl.ScreenTools   1.0
diff --git a/src/QmlControls/QGCToolBarButton.qml b/src/QmlControls/QGCToolBarButton.qml
index ad3dbee22dd3133a85b5f3ec511e5a2d84fc3563..c73ec75b83b25b67cd8e0dae1a1083c2788684b7 100644
--- a/src/QmlControls/QGCToolBarButton.qml
+++ b/src/QmlControls/QGCToolBarButton.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.Controls      1.0
 import QGroundControl.Palette       1.0
diff --git a/src/QmlControls/QGCView.qml b/src/QmlControls/QGCView.qml
index e83b042c1c772e24a18c2ece05002362651c968b..3bced362f76dc34fc98a07b193e9b3b55b2f9a73 100644
--- a/src/QmlControls/QGCView.qml
+++ b/src/QmlControls/QGCView.qml
@@ -11,8 +11,8 @@
 /// @file
 ///     @author Don Gagne <don@thegagnes.com>
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs 1.2
 
 import QGroundControl.Controls 1.0
diff --git a/src/QmlControls/QGCViewDialog.qml b/src/QmlControls/QGCViewDialog.qml
index 2af33e4aebea460b632075ce1b685428c5cfce8a..f8d1443569c873b31c7807fb76a3738c7e16d550 100644
--- a/src/QmlControls/QGCViewDialog.qml
+++ b/src/QmlControls/QGCViewDialog.qml
@@ -11,8 +11,8 @@
 /// @file
 ///     @author Don Gagne <don@thegagnes.com>
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.Controls 1.0
 import QGroundControl.Palette 1.0
diff --git a/src/QmlControls/QGCViewMessage.qml b/src/QmlControls/QGCViewMessage.qml
index 0e9ae00c5ad03aacd2956e81309d84a6045a21c1..9d58df0bb8b3057e3c5941275c313fa55ea5678c 100644
--- a/src/QmlControls/QGCViewMessage.qml
+++ b/src/QmlControls/QGCViewMessage.qml
@@ -11,8 +11,8 @@
 /// @file
 ///     @author Don Gagne <don@thegagnes.com>
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.Controls 1.0
 import QGroundControl.Palette 1.0
diff --git a/src/QmlControls/QGCViewPanel.qml b/src/QmlControls/QGCViewPanel.qml
index 51eb109a64e92a0d7e17045d5cf9d0c88dcef9b2..cd179138f74dce5858059f4a3e8b5cd690380fd3 100644
--- a/src/QmlControls/QGCViewPanel.qml
+++ b/src/QmlControls/QGCViewPanel.qml
@@ -11,8 +11,8 @@
 /// @file
 ///     @author Don Gagne <don@thegagnes.com>
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.Palette 1.0
 import QGroundControl.Controls 1.0
diff --git a/src/QmlControls/QmlTest.qml b/src/QmlControls/QmlTest.qml
index 9970976bb59bd53424e14c794fcf3c546669ca3c..554179daaa59ae6609e5caedb81b983a9e8a0b7c 100644
--- a/src/QmlControls/QmlTest.qml
+++ b/src/QmlControls/QmlTest.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 
 import QGroundControl.Palette 1.0
diff --git a/src/QmlControls/RCChannelMonitor.qml b/src/QmlControls/RCChannelMonitor.qml
index 72f79617300a343ac24d53e99582437d47792c3a..e98b7116f5697b5ee07ac37041f30cb08cc6d001 100644
--- a/src/QmlControls/RCChannelMonitor.qml
+++ b/src/QmlControls/RCChannelMonitor.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl               1.0
diff --git a/src/QmlControls/RoundButton.qml b/src/QmlControls/RoundButton.qml
index 25131881e8db3664e243e1b877a123500c81d53f..dc58856dd643272d814b881e73f0f78296c99755 100644
--- a/src/QmlControls/RoundButton.qml
+++ b/src/QmlControls/RoundButton.qml
@@ -1,5 +1,5 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 
 import QGroundControl.ScreenTools   1.0
diff --git a/src/QmlControls/ScreenTools.qml b/src/QmlControls/ScreenTools.qml
index 4147df26541ec0aa701578cd6f98205eb4277748..84fa4b7c20046d7fb3cc229dcc5b7c6c7f7b51fc 100644
--- a/src/QmlControls/ScreenTools.qml
+++ b/src/QmlControls/ScreenTools.qml
@@ -1,7 +1,7 @@
 pragma Singleton
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Window 2.2
 
 import QGroundControl                       1.0
diff --git a/src/QmlControls/SliderSwitch.qml b/src/QmlControls/SliderSwitch.qml
index 0d6d59d258174306df6d6f573615494a0cd3ba6b..ae51d4b666a1bc17bddece8f29de1941eece370d 100644
--- a/src/QmlControls/SliderSwitch.qml
+++ b/src/QmlControls/SliderSwitch.qml
@@ -1,5 +1,5 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 
 import QGroundControl.ScreenTools   1.0
 import QGroundControl.Palette       1.0
diff --git a/src/QmlControls/SubMenuButton.qml b/src/QmlControls/SubMenuButton.qml
index 47211badf5014888712010e66bbf6b047cc50c91..d7e3dbb8fca1562aa906aa10d047d67c7278338d 100644
--- a/src/QmlControls/SubMenuButton.qml
+++ b/src/QmlControls/SubMenuButton.qml
@@ -1,5 +1,5 @@
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtGraphicalEffects       1.0
 
diff --git a/src/QmlControls/ToolStrip.qml b/src/QmlControls/ToolStrip.qml
index dbd5e98ea05cc0c56b5d292de622de3c61f9c6da..b7f75f8bd11a033ac400c6a8f4dc822a246afbd1 100644
--- a/src/QmlControls/ToolStrip.qml
+++ b/src/QmlControls/ToolStrip.qml
@@ -7,8 +7,8 @@
  *
  ****************************************************************************/
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.ScreenTools   1.0
 import QGroundControl.Palette       1.0
diff --git a/src/QmlControls/VehicleRotationCal.qml b/src/QmlControls/VehicleRotationCal.qml
index 350fd5ee31194a70f9682f60b570995ff9e127e9..3af615c2863d03af8d8354a038e3c2e004088293 100644
--- a/src/QmlControls/VehicleRotationCal.qml
+++ b/src/QmlControls/VehicleRotationCal.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 
 import QGroundControl.Palette 1.0
diff --git a/src/QmlControls/VehicleSummaryRow.qml b/src/QmlControls/VehicleSummaryRow.qml
index 0e0e29078cb24079beb5465b96e843140ee1b677..e3d125dc276e53d4d17ea09915487dadf141cc00 100644
--- a/src/QmlControls/VehicleSummaryRow.qml
+++ b/src/QmlControls/VehicleSummaryRow.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 
 Row {
diff --git a/src/QtLocationPlugin/QMLControl/OfflineMap.qml b/src/QtLocationPlugin/QMLControl/OfflineMap.qml
index 808ba02b4e5c81550c25eef63a01844cc494b948..5ba394de30e94e86185eab965fa0525c703697e2 100644
--- a/src/QtLocationPlugin/QMLControl/OfflineMap.qml
+++ b/src/QtLocationPlugin/QMLControl/OfflineMap.qml
@@ -7,13 +7,13 @@
  *
  ****************************************************************************/
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
-import QtQuick.Layouts          1.3
-import QtLocation               5.6
-import QtPositioning            5.5
+import QtQuick.Layouts          1.2
+import QtLocation               5.3
+import QtPositioning            5.3
 
 import QGroundControl               1.0
 import QGroundControl.Controls      1.0
diff --git a/src/VehicleSetup/FirmwareUpgrade.qml b/src/VehicleSetup/FirmwareUpgrade.qml
index 372fff58d14ccb63ef755cc28b9869712013882c..d20ee293134aa3861f6c1d1ef30ce2d551d356dd 100644
--- a/src/VehicleSetup/FirmwareUpgrade.qml
+++ b/src/VehicleSetup/FirmwareUpgrade.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 import QtQuick.Dialogs 1.2
 
diff --git a/src/VehicleSetup/JoystickConfig.qml b/src/VehicleSetup/JoystickConfig.qml
index 30234cd7d2bfad9e1e8af96e6ff055304cf5822c..3ac79d475f9f57bfaa7100917a08b03bf2076f31 100644
--- a/src/VehicleSetup/JoystickConfig.qml
+++ b/src/VehicleSetup/JoystickConfig.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl               1.0
diff --git a/src/VehicleSetup/PX4FlowSensor.qml b/src/VehicleSetup/PX4FlowSensor.qml
index a28962dd68da8a1c16e7c9234705f30761544340..bae6244eb9b45685b804065ff1fdbb707ed574ba 100644
--- a/src/VehicleSetup/PX4FlowSensor.qml
+++ b/src/VehicleSetup/PX4FlowSensor.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
 
diff --git a/src/VehicleSetup/SetupParameterEditor.qml b/src/VehicleSetup/SetupParameterEditor.qml
index bd1bdafa161a5971446aaaccd941094f7708295a..9f1b2008fef3f97933e19c95d7e0eb12892929b3 100644
--- a/src/VehicleSetup/SetupParameterEditor.qml
+++ b/src/VehicleSetup/SetupParameterEditor.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl.Controls 1.0
 import QGroundControl.ScreenTools 1.0
diff --git a/src/VehicleSetup/SetupView.qml b/src/VehicleSetup/SetupView.qml
index 5ca18bb532ca7316c6790dd3c5ed032b2b9fbc48..ac1156397cb78ccee0f1f832a597d2e21b20ae6a 100644
--- a/src/VehicleSetup/SetupView.qml
+++ b/src/VehicleSetup/SetupView.qml
@@ -12,8 +12,8 @@
 ///     @brief Setup View
 ///     @author Don Gagne <don@thegagnes.com>
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl                       1.0
 import QGroundControl.AutoPilotPlugin       1.0
diff --git a/src/VehicleSetup/VehicleSummary.qml b/src/VehicleSetup/VehicleSummary.qml
index 27b7eb7e850855d18b692d6bb22816119f5eccbc..a26d6df93c00c2f2bad0df6dcb4f7851cf93e42b 100644
--- a/src/VehicleSetup/VehicleSummary.qml
+++ b/src/VehicleSetup/VehicleSummary.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 
 import QGroundControl                       1.0
diff --git a/src/ViewWidgets/CustomCommandWidget.qml b/src/ViewWidgets/CustomCommandWidget.qml
index af49f6352a57c51ac7f7fc089b116f0adb02fdde..c73ed1635d7dd5941018be2d1d9bbdb4dab0e1af 100644
--- a/src/ViewWidgets/CustomCommandWidget.qml
+++ b/src/ViewWidgets/CustomCommandWidget.qml
@@ -11,8 +11,8 @@
 /// @file
 ///     @author Don Gagne <don@thegagnes.com>
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
 
diff --git a/src/ViewWidgets/ViewWidget.qml b/src/ViewWidgets/ViewWidget.qml
index 16124cfa70832b3a19696e32a551259ef66af888..04c0c2f14308a63ade1b35f850e717155a8c38a2 100644
--- a/src/ViewWidgets/ViewWidget.qml
+++ b/src/ViewWidgets/ViewWidget.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 
 import QGroundControl.Palette 1.0
diff --git a/src/test.qml b/src/test.qml
index 017b53bffd4fa05344ab70233b5a96c64114f38a..988f1c5f2b040976000e33c6a3dc6000ead550da 100644
--- a/src/test.qml
+++ b/src/test.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 
 import QGroundControl.FactControls 1.0
diff --git a/src/ui/AppSettings.qml b/src/ui/AppSettings.qml
index 505e7aae7debf0383500b5296ce2717f9128ef46..80bb69fa5957751d0f9042d0422f63dd4dc5c778 100644
--- a/src/ui/AppSettings.qml
+++ b/src/ui/AppSettings.qml
@@ -8,9 +8,9 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtPositioning    5.5
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtPositioning    5.3
 
 import QGroundControl               1.0
 import QGroundControl.Palette       1.0
diff --git a/src/ui/MainWindowHybrid.qml b/src/ui/MainWindowHybrid.qml
index 011412f91923cec28edda2a996c665feee848847..408ea37a94b60bc4808c1467f4134a3d4b20facd 100644
--- a/src/ui/MainWindowHybrid.qml
+++ b/src/ui/MainWindowHybrid.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl           1.0
diff --git a/src/ui/MainWindowInner.qml b/src/ui/MainWindowInner.qml
index 2768a0af49436ec669fafb550ac0d59117eb8d2c..6e5d2d9958b76704d5413ce3c50f9d18be222d32 100644
--- a/src/ui/MainWindowInner.qml
+++ b/src/ui/MainWindowInner.qml
@@ -8,10 +8,10 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
-import QtPositioning    5.5
+import QtPositioning    5.3
 
 import QGroundControl                       1.0
 import QGroundControl.Palette               1.0
diff --git a/src/ui/MainWindowNative.qml b/src/ui/MainWindowNative.qml
index ded0dce50b6ced243505bd3a67a667941539dffd..1b7cbe17ef43e8e2b3862f1e30e44faa0a593367 100644
--- a/src/ui/MainWindowNative.qml
+++ b/src/ui/MainWindowNative.qml
@@ -8,7 +8,7 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
+import QtQuick          2.3
 import QtQuick.Window   2.2
 import QtQuick.Dialogs  1.2
 
diff --git a/src/ui/preferences/BluetoothSettings.qml b/src/ui/preferences/BluetoothSettings.qml
index c111acbb2d138aa58383723892e9ef22df07d285..375759186cfe301341ff70fc7918fc8365d0ea2d 100644
--- a/src/ui/preferences/BluetoothSettings.qml
+++ b/src/ui/preferences/BluetoothSettings.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl                       1.0
diff --git a/src/ui/preferences/DebugWindow.qml b/src/ui/preferences/DebugWindow.qml
index 3e8ddb6da24107f0aa2eb3388747ba208e5846d2..c070de81082bbd4fb08f4f5e0b3b6d228608b821 100644
--- a/src/ui/preferences/DebugWindow.qml
+++ b/src/ui/preferences/DebugWindow.qml
@@ -8,11 +8,11 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
-import QtQuick.Controls 1.4
+import QtQuick 2.3
+import QtQuick.Controls 1.2
 import QtQuick.Controls.Styles 1.4
 import QtQuick.Dialogs 1.2
-import QtQuick.Layouts 1.3
+import QtQuick.Layouts 1.2
 import QtQuick.Window 2.2
 
 import QGroundControl.Controls 1.0
diff --git a/src/ui/preferences/GeneralSettings.qml b/src/ui/preferences/GeneralSettings.qml
index d80dc44397dfcc4b011e00b7621472968f6061c8..e6372e722971e9822feb16c7d8f40fcbb6e8b76b 100644
--- a/src/ui/preferences/GeneralSettings.qml
+++ b/src/ui/preferences/GeneralSettings.qml
@@ -8,12 +8,12 @@
  ****************************************************************************/
 
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
-import QtMultimedia             5.8
-import QtQuick.Layouts          1.3
+import QtMultimedia             5.5
+import QtQuick.Layouts          1.2
 
 import QGroundControl                       1.0
 import QGroundControl.FactSystem            1.0
diff --git a/src/ui/preferences/LinkSettings.qml b/src/ui/preferences/LinkSettings.qml
index cb0a234ab2e7ffc1d4582df263261aab0e02822f..cb49848f172143fd7f44e2331fff75ee37ebf2bb 100644
--- a/src/ui/preferences/LinkSettings.qml
+++ b/src/ui/preferences/LinkSettings.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl                       1.0
diff --git a/src/ui/preferences/LogReplaySettings.qml b/src/ui/preferences/LogReplaySettings.qml
index 511c8b4312b75e92e68942d6b5068f5998e78317..079fe5461d6738edd253d85ad127c0fe456b418e 100644
--- a/src/ui/preferences/LogReplaySettings.qml
+++ b/src/ui/preferences/LogReplaySettings.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl                       1.0
diff --git a/src/ui/preferences/MavlinkSettings.qml b/src/ui/preferences/MavlinkSettings.qml
index f52ab0fee97400392fbd4ebe31ff22dddd1877a2..333cee9e866e4723131ced23e6cc392612b66acc 100644
--- a/src/ui/preferences/MavlinkSettings.qml
+++ b/src/ui/preferences/MavlinkSettings.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick                  2.7
-import QtQuick.Controls         1.4
+import QtQuick                  2.3
+import QtQuick.Controls         1.2
 import QtQuick.Controls.Styles  1.4
 import QtQuick.Dialogs          1.2
 
diff --git a/src/ui/preferences/MockLink.qml b/src/ui/preferences/MockLink.qml
index c850ae2ddbbdc39f5c2624bebadd1721aba24544..5c5e476fd4813e1571fafd6f551c16ad25e1761a 100644
--- a/src/ui/preferences/MockLink.qml
+++ b/src/ui/preferences/MockLink.qml
@@ -8,7 +8,7 @@
  ****************************************************************************/
 
 
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl               1.0
 import QGroundControl.Controls      1.0
diff --git a/src/ui/preferences/MockLinkSettings.qml b/src/ui/preferences/MockLinkSettings.qml
index 47d6d35c831d0375544270a3e779cad293e13797..e7d5cf1084b884b53bd432966deb73a840930de3 100644
--- a/src/ui/preferences/MockLinkSettings.qml
+++ b/src/ui/preferences/MockLinkSettings.qml
@@ -8,9 +8,9 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl                       1.0
 import QGroundControl.Controls              1.0
diff --git a/src/ui/preferences/SerialSettings.qml b/src/ui/preferences/SerialSettings.qml
index afb3194183ddd64710bb00486280763bf50a15a8..07e495605085212cc6b9e53f5d25f3cc975e32cf 100644
--- a/src/ui/preferences/SerialSettings.qml
+++ b/src/ui/preferences/SerialSettings.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl                       1.0
diff --git a/src/ui/preferences/TcpSettings.qml b/src/ui/preferences/TcpSettings.qml
index 9b040b3ed68ddf29c83b57e009cd55d8722787ea..182cf4d6167459bb9702999a11322ee114bc5044 100644
--- a/src/ui/preferences/TcpSettings.qml
+++ b/src/ui/preferences/TcpSettings.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl                       1.0
diff --git a/src/ui/preferences/UdpSettings.qml b/src/ui/preferences/UdpSettings.qml
index 5493031ea480e3126e2bc873b764465a583d19c8..825b1bd79b80efe7fdd7ee78fa749790510817a8 100644
--- a/src/ui/preferences/UdpSettings.qml
+++ b/src/ui/preferences/UdpSettings.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
 
 import QGroundControl                       1.0
diff --git a/src/ui/toolbar/BatteryIndicator.qml b/src/ui/toolbar/BatteryIndicator.qml
index 0a6242ab430741559265b22b4f21e202bc61054d..07bf24af4097100d32a1a33cc33b55761d51c5ad 100644
--- a/src/ui/toolbar/BatteryIndicator.qml
+++ b/src/ui/toolbar/BatteryIndicator.qml
@@ -8,9 +8,9 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl                       1.0
 import QGroundControl.Controls              1.0
diff --git a/src/ui/toolbar/GPSIndicator.qml b/src/ui/toolbar/GPSIndicator.qml
index 0920867fc448dd1bcf6c643cf79f08919057a8fc..709a32884a06488e89c39737444f55a201515e83 100644
--- a/src/ui/toolbar/GPSIndicator.qml
+++ b/src/ui/toolbar/GPSIndicator.qml
@@ -8,9 +8,9 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl                       1.0
 import QGroundControl.Controls              1.0
diff --git a/src/ui/toolbar/MainToolBar.qml b/src/ui/toolbar/MainToolBar.qml
index 058699eb0525c57408c07ffaa926a19e59e141c8..1ee5aa2e4621630e9b84d0e5e6232a2ad83393d8 100644
--- a/src/ui/toolbar/MainToolBar.qml
+++ b/src/ui/toolbar/MainToolBar.qml
@@ -7,9 +7,9 @@
  *
  ****************************************************************************/
 
-import QtQuick              2.7
-import QtQuick.Layouts      1.3
-import QtQuick.Controls     1.4
+import QtQuick              2.3
+import QtQuick.Layouts      1.2
+import QtQuick.Controls     1.2
 
 import QGroundControl                       1.0
 import QGroundControl.Controls              1.0
diff --git a/src/ui/toolbar/MainToolBarIndicators.qml b/src/ui/toolbar/MainToolBarIndicators.qml
index e212bc76abd1eafac07a0eea3ccf003e145b8e29..27e61fb35b28784e5fa68bf823fbbd383a428c5b 100644
--- a/src/ui/toolbar/MainToolBarIndicators.qml
+++ b/src/ui/toolbar/MainToolBarIndicators.qml
@@ -8,9 +8,9 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl                       1.0
 import QGroundControl.Controls              1.0
diff --git a/src/ui/toolbar/MessageIndicator.qml b/src/ui/toolbar/MessageIndicator.qml
index 186d059a7793c10a1402a87f5bcf2093b0555081..1cb6057175e11cd072b50d1e8524653343583bec 100644
--- a/src/ui/toolbar/MessageIndicator.qml
+++ b/src/ui/toolbar/MessageIndicator.qml
@@ -8,9 +8,9 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl                       1.0
 import QGroundControl.Controls              1.0
diff --git a/src/ui/toolbar/ModeIndicator.qml b/src/ui/toolbar/ModeIndicator.qml
index b86c2b4cf064ec6dcef06ca9c35b128ebb7d7a59..20fdea306b6f7b060935f2ddd8b5de28e0ff8543 100644
--- a/src/ui/toolbar/ModeIndicator.qml
+++ b/src/ui/toolbar/ModeIndicator.qml
@@ -8,8 +8,8 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
+import QtQuick          2.3
+import QtQuick.Controls 1.2
 
 import QGroundControl                       1.0
 import QGroundControl.Controls              1.0
diff --git a/src/ui/toolbar/RCRSSIIndicator.qml b/src/ui/toolbar/RCRSSIIndicator.qml
index bed0eddfd939b632b361ce0c6e96920f2581d51b..f4425a684f1a4394047b753fbdb76017bed60e0b 100644
--- a/src/ui/toolbar/RCRSSIIndicator.qml
+++ b/src/ui/toolbar/RCRSSIIndicator.qml
@@ -8,9 +8,9 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl                       1.0
 import QGroundControl.Controls              1.0
diff --git a/src/ui/toolbar/SignalStrength.qml b/src/ui/toolbar/SignalStrength.qml
index ada38752dddb16e53fcdfaa1abd43fd2d8dbc073..942cb0b2b49b5b795e2f172733ed903e44785c8c 100644
--- a/src/ui/toolbar/SignalStrength.qml
+++ b/src/ui/toolbar/SignalStrength.qml
@@ -14,7 +14,7 @@
  *   @author Gus Grubba <mavlink@grubba.com>
  */
 
-import QtQuick 2.7
+import QtQuick 2.3
 
 import QGroundControl.Controls  1.0
 import QGroundControl.Palette   1.0
diff --git a/src/ui/toolbar/TelemetryRSSIIndicator.qml b/src/ui/toolbar/TelemetryRSSIIndicator.qml
index bed7cd970c1f9e6156c7373192266546b8cade38..eeac61e5be40bea5cbd39db8af6fd0292342d5d4 100644
--- a/src/ui/toolbar/TelemetryRSSIIndicator.qml
+++ b/src/ui/toolbar/TelemetryRSSIIndicator.qml
@@ -8,9 +8,9 @@
  ****************************************************************************/
 
 
-import QtQuick          2.7
-import QtQuick.Controls 1.4
-import QtQuick.Layouts  1.3
+import QtQuick          2.3
+import QtQuick.Controls 1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl                       1.0
 import QGroundControl.Controls              1.0