Merge pull request #3021 from DonLakeFlyer/PropCleanup

src/FlightDisplay/FlightDisplayView.qml

src/FlightDisplay/FlightDisplayViewMap.qml

src/FlightDisplay/FlightDisplayViewVideo.qml

src/FlightDisplay/FlightDisplayViewWidgets.qml

src/FlightMap/Widgets/QGCInstrumentWidget.qml

src/MissionEditor/MissionEditor.qml

src/QGCApplication.cc

src/QGCQuickWidget.cc

src/QmlControls/ParameterEditor.qml

src/VehicleSetup/FirmwareUpgrade.qml

src/VehicleSetup/JoystickConfig.qml

src/VehicleSetup/PX4FlowSensor.qml

src/VehicleSetup/SetupView.qml

src/VehicleSetup/VehicleSummary.qml

src/ui/MainWindowInner.qml

src/ui/preferences/MavlinkSettings.qml

src/ui/toolbar/MainToolBar.qml

src/ui/toolbar/MainToolBarIndicators.qml