Better handling of Flight Plan Complete comm lost scenarios

src/FlightDisplay/FlightDisplayView.qml

@@ -163,6 +163,12 @@ QGCView {
         id: missionCompleteDialogComponent
 
         QGCViewDialog {
+            property var activeVehicleCopy: _activeVehicle
+            onActiveVehicleCopyChanged:
+                if (!activeVehicleCopy) {
+                    hideDialog()
+                }
+
             QGCFlickable {
                 anchors.fill:   parent
                 contentHeight:  column.height
@@ -172,7 +178,11 @@ QGCView {
                     anchors.margins:    _margins
                     anchors.left:       parent.left
                     anchors.right:      parent.right
+
+                    ColumnLayout {
+                        Layout.fillWidth:   true
                         spacing:            ScreenTools.defaultFontPixelHeight
+                        visible:            !_activeVehicle.connectionLost || !_guidedController.showResumeMission
 
                         QGCLabel {
                             Layout.fillWidth:       true
@@ -230,6 +240,20 @@ QGCView {
                             visible:            _guidedController.showResumeMission
                         }
                     }
+
+                    ColumnLayout {
+                        Layout.fillWidth:   true
+                        spacing:            ScreenTools.defaultFontPixelHeight
+                        visible:            _activeVehicle.connectionLost && _guidedController.showResumeMission
+
+                        QGCLabel {
+                            Layout.fillWidth:   true
+                            wrapMode:           Text.WordWrap
+                            color:              qgcPal.warningText
+                            text:               qsTr("If you are changing batteries for Resume Mission do not disconnect from the vehicle.")
+                        }
+                    }
+                }
             }
         }
     }