Merge pull request #5859 from mavlink/videoStreamControl

.travis.yml

qgroundcontrol.qrc

src/FlightDisplay/FlightDisplayView.qml

src/FlightDisplay/FlightDisplayViewVideo.qml

src/FlightDisplay/FlightDisplayViewWidgets.qml

src/FlightMap/Widgets/QGCInstrumentWidgetAlternate.qml

src/FlightMap/Widgets/VideoPageWidget.qml

src/QmlControls/PageView.qml

src/QmlControls/QGCSwitch.qml

src/QmlControls/QGroundControl.Controls.qmldir

src/Settings/Video.SettingsGroup.json

src/Settings/VideoSettings.cc

src/Settings/VideoSettings.h

src/Vehicle/Vehicle.cc

src/VideoStreaming/VideoReceiver.cc

src/VideoStreaming/VideoReceiver.h

src/api/QGCCorePlugin.cc

src/ui/preferences/GeneralSettings.qml