Merge pull request #4875 from DonLakeFlyer/FWLandBugFixes

src/FirmwarePlugin/PX4/MavCmdInfoCommon.json

src/FirmwarePlugin/PX4/MavCmdInfoFixedWing.json

src/FlightDisplay/FlightDisplayViewMap.qml

src/MissionManager/FixedWingLandingComplexItem.cc

src/MissionManager/FixedWingLandingComplexItem.h

src/MissionManager/MissionController.cc

src/ui/MainWindow.cc

src/ui/MainWindow.h

src/ui/MainWindow.ui