Forcing QGC to use Mavlink V2 if vehicle supports it.

Too buggy to leave in for now

Also added new FirmwarePlugin::brandImage support

No signing support yet

_finalize methods need information which is not available if all you
have is a mavlink_message_t

This reverts commit ae976049ca7b4818616e6b8be07a028fc7dfc26f.

Includes ability to load params

Move battery.percentRemainingAnnounce to Qml Global

The static Fact was causes problems with Qml

offline mission planning settings

more conversion stuff

some fixes and added area unit drop down

Conflicts:
	src/MissionEditor/MissionItemStatus.qml

removed comment

finish unit conversion

correcting typos

This is all going away in 3.1 so don’t want to spend time fixing broken
font sizing