Double click to delete a vertex

src/FlightMap/MapItems/MissionItemIndicatorDrag.qml

@@ -29,6 +29,7 @@ Rectangle {
     property var itemCoordinate ///< Coordinate we are updating during drag
 
     signal clicked
+    signal doubleClicked
     signal dragStart
     signal dragStop
 
@@ -76,6 +77,11 @@ Rectangle {
             itemDragger.clicked()
         }
 
+        onDoubleClicked: {
+            focus = true
+            itemDragger.doubleClicked()
+        }
+
         property bool dragActive: drag.active
         onDragActiveChanged: {
             if (dragActive) {

src/MissionManager/QGCMapPolygonVisuals.qml

@@ -291,7 +291,7 @@ Item {
                 }
             }
 
-            onClicked: mapPolygon.removeVertex(polygonVertex)
+            onDoubleClicked: mapPolygon.removeVertex(polygonVertex)
         }
     }
 

src/MissionManager/QGCMapPolylineVisuals.qml

@@ -128,10 +128,10 @@ Item {
 
     Menu {
         id: menu
-
         property int removeVertex
 
         MenuItem {
+            id:             removeVertexItem
             text:           qsTr("Remove vertex" )
             onTriggered:    mapPolyline.removeVertex(parent.removeVertex)
         }
@@ -140,6 +140,10 @@ Item {
             text:           qsTr("Load KML...")
             onTriggered:    kmlLoadDialog.openForLoad()
         }
+
+        function resetMenu() {
+            removeVertexItem.visible = mapPolyline.count > 2
+        }
     }
 
     Component {
@@ -167,7 +171,7 @@ Item {
                 width:          ScreenTools.defaultFontPixelHeight * 1.5
                 height:         width
                 radius:         width / 2
-                border.color:      "white"
+                border.color:   "white"
                 color:          "transparent"
                 opacity:        .50
                 z:              _zorderSplitHandle
@@ -243,10 +247,13 @@ Item {
             }
 
             onClicked: {
-                if (polylineVertex == 0) {
-                    menu.removeVertex = polylineVertex
-                    menu.popup()
-                } else {
+                menu.resetMenu()
+                menu.removeVertex = polylineVertex
+                menu.popup()
+            }
+
+            onDoubleClicked: {
+                if (polylineVertex != 0) {
                     mapPolyline.removeVertex(polylineVertex)
                 }
             }
@@ -271,15 +278,7 @@ Item {
                 height:     width
                 radius:     width / 2
                 color:      "white"
-                opacity:    .90
-
-                QGCLabel {
-                    anchors.horizontalCenter:   parent.horizontalCenter
-                    anchors.verticalCenter:     parent.verticalCenter
-                    text:                       "..."
-                    color:                      "black"
-                    visible:                    polylineVertex == 0
-                }
+                opacity:    0.9
             }
         }
     }

src/PlanView/CorridorScanEditor.qml

@@ -106,11 +106,11 @@ Rectangle {
 
             QGCCheckBox {
                 id:                 relAlt
-                anchors.left:       parent.left
                 text:               qsTr("Relative altitude")
                 checked:            missionItem.cameraCalc.distanceToSurfaceRelative
                 enabled:            missionItem.cameraCalc.isManualCamera && !missionItem.followTerrain
                 visible:            QGroundControl.corePlugin.options.showMissionAbsoluteAltitude || (!missionItem.cameraCalc.distanceToSurfaceRelative && !missionItem.followTerrain)
+                Layout.alignment:   Qt.AlignLeft
                 Layout.columnSpan:  2
                 onClicked:          missionItem.cameraCalc.distanceToSurfaceRelative = checked
 
@@ -146,12 +146,11 @@ Rectangle {
             }
 
             GridLayout {
-                anchors.left:   parent.left
-                anchors.right:  parent.right
-                columnSpacing:  _margin
-                rowSpacing:     _margin
-                columns:        2
-                visible:        followsTerrainCheckBox.checked
+                Layout.fillWidth:   true
+                columnSpacing:      _margin
+                rowSpacing:         _margin
+                columns:            2
+                visible:            followsTerrainCheckBox.checked
 
                 QGCLabel { text: qsTr("Tolerance") }
                 FactTextField {