Merge pull request #4918 from DonLakeFlyer/QGCToolboxParenting

src/FactSystem/Fact.cc

src/FactSystem/FactSystem.cc

src/FactSystem/FactSystem.h

src/FirmwarePlugin/FirmwarePluginManager.cc

src/FirmwarePlugin/FirmwarePluginManager.h

src/FlightDisplay/VideoManager.cc

src/FlightDisplay/VideoManager.h

src/FollowMe/FollowMe.cc

src/FollowMe/FollowMe.h

src/GAudioOutput.cc

src/GAudioOutput.h

src/GPS/GPSManager.cc

src/GPS/GPSManager.h

src/Joystick/JoystickManager.cc

src/Joystick/JoystickManager.h

src/MissionManager/MissionCommandTree.cc

src/MissionManager/MissionCommandTree.h

src/MissionManager/MissionCommandTreeTest.cc

src/PositionManager/PositionManager.cpp

src/PositionManager/PositionManager.h