Show existing file to save to

src/QmlControls/QGCFileDialog.qml

 import QtQuick          2.3
 import QtQuick.Controls 1.2
 import QtQuick.Dialogs  1.2
+import QtQuick.Layouts  1.2
 
 import QGroundControl               1.0
 import QGroundControl.ScreenTools   1.0
@@ -21,12 +22,14 @@ Item {
     property bool   selectExisting
     property bool   selectFolder
 
-    property bool _openForLoad
+    property bool _openForLoad: true
     property real _margins:     ScreenTools.defaultFontPixelHeight / 2
+    property bool _mobile:      ScreenTools.isMobile
+
 
     function openForLoad() {
         _openForLoad = true
-        if (ScreenTools.isMobile && folder.length !== 0) {
+        if (_mobile && folder.length !== 0) {
             qgcView.showDialog(mobileFileOpenDialog, title, qgcView.showDialogDefaultWidth, StandardButton.Cancel)
         } else {
             fullFileDialog.open()
@@ -35,7 +38,7 @@ Item {
 
     function openForSave() {
         _openForLoad = false
-        if (ScreenTools.isMobile && folder.length !== 0) {
+        if (_mobile && folder.length !== 0) {
             qgcView.showDialog(mobileFileSaveDialog, title, qgcView.showDialogDefaultWidth, StandardButton.Cancel | StandardButton.Ok)
         } else {
             fullFileDialog.open()
@@ -76,18 +79,23 @@ Item {
         id: mobileFileOpenDialog
 
         QGCViewDialog {
-            Item {
-                anchors.margins:    _margins
+            QGCFlickable {
                 anchors.fill:   parent
+                contentHeight:  fileOpenColumn.height
 
-                QGCListView {
-                    id:             listView
-                    anchors.fill:   parent
-                    spacing:        _margins / 2
-                    orientation:    ListView.Vertical
+                Column {
+                    id:             fileOpenColumn
+                    anchors.left:   parent.left
+                    anchors.right:  parent.right
+                    spacing:        ScreenTools.defaultFontPixelHeight / 2
+
+                    Repeater {
+                        id:     fileList;
                         model:  controller.getFiles(folder, fileExtension)
 
-                    delegate: QGCButton {
+                        QGCButton {
+                            anchors.left:   parent.left
+                            anchors.right:  parent.right
                             text:           modelData
 
                             onClicked: {
@@ -99,7 +107,8 @@ Item {
 
                     QGCLabel {
                         text:       qsTr("No files")
-                    visible:    listView.model.length == 0
+                        visible:    fileList.model.length == 0
+                    }
                 }
             }
         }
@@ -123,19 +132,29 @@ Item {
                 hideDialog()
             }
 
+            QGCFlickable {
+                anchors.fill:   parent
+                contentHeight:  fileSaveColumn.height
+
                 Column {
+                    id:             fileSaveColumn
                     anchors.left:   parent.left
                     anchors.right:  parent.right
-                spacing:        ScreenTools.defaultFontPixelHeight
+                    spacing:        ScreenTools.defaultFontPixelHeight / 2
 
-                QGCLabel {
-                    text: qsTr("File name:")
-                }
+                    RowLayout {
+                        anchors.left:   parent.left
+                        anchors.right:  parent.right
+                        spacing:        ScreenTools.defaultFontPixelWidth
+
+                        QGCLabel { text: qsTr("New file name:") }
 
                         QGCTextField {
                             id:                 filenameTextField
+                            Layout.fillWidth:   true
                             onTextChanged:      replaceMessage.visible = false
                         }
+                    }
 
                     QGCLabel {
                         anchors.left:   parent.left
@@ -153,6 +172,30 @@ Item {
                         visible:        false
                         color:          qgcPal.warningText
                     }
+
+                    SectionHeader {
+                        anchors.left:   parent.left
+                        anchors.right:  parent.right
+                        text:           qsTr("Save to existing file:")
+                    }
+
+                    Repeater {
+                        model: controller.getFiles(folder, fileExtension)
+
+                        QGCButton {
+                            anchors.left:   parent.left
+                            anchors.right:  parent.right
+                            text:           modelData
+
+                            onClicked: {
+                                hideDialog()
+                                _root.acceptedForSave(controller.fullyQualifiedFilename(folder, modelData, fileExtension))
+                            }
+                        }
+                    }
+
+
+                }
             }
         }
     }