Add support for Orbit flight mode

Show Orbit center from telemetry

Fix AutoLoad not sending GeoFence or Rally Points to vehicle

Fix Rally Point loading

Fix handling of dirty bit when home position changes from vehicle side

Fix rotation

Fix bit check

Fix category change signalling.

Three components for better testing

Fix support for single vehicle coming and going

Show orbit telemetry status on map

Remove incorrect zorder

Larger arrow size

* Add support for showing rotation on QGCMapCircle.
* Support rotation change for Orbit

Fix connections to offline vehicle

Remove incorrect vehicle yaw

Fix Values Widget gear color based on new combo box colors

ArduPilot option to not start mavlink streams

Initialization of Fact prior to Qt init causes crash.

Clip video rectangle so when aspect ratio is adjusted, the image is not larger than the containing (window) rectagle.

Prevent counter overflow