Fixing Android screen orientation.

It now uses the sensor to maintain proper landscape mode.

Update NSIS script to include ANGLE dlls for windows, add NSIS script…

Enable Android Video Streaming

Map menu fixes

- Only show video option if supported
- Persist settings
- Show/Hide/Add items correctly

While at it, fixed an issue with builds that have video streaming disabled.

Add switch for using old/new mission editor

More mission editing work

Add video background support

Mission editor (WIP)

- Restructured a number of MissionItem properties as well

appveyor support (windows ci)

fix linux unittests failure

Restructure map controls for better reusability

Conflicts:
	src/FlightDisplay/FlightDisplayView.qml

Don't show vehicle till 2d gps lock