Change in visibility was causing combo box contents to reset. Visible
goes to false even when you move away from Plan view, not just when the
combo is unused.

Filter out calibration messages

No flaps for multi-rotor

New vehicle health display using SYS_STATUS info

Better Plan view map viewport handling

Change default takeoff alt to 3 meters

- Incorrect signaling causing dirty but to be incorrect
- Remove all not working
- Min fence point count incorrect

This gets it above your head

Update ArduSub mocklink parameter file.

Add QGC version info to bottom of Settings/General

Checking for MAVLink 2.0 when first message is received.

MAVLink consistency

Replacing a few placeholder icons with real ones.

I18N

Mavlink log uploader

Moving source files into Vehicles as it is a more coherent place.

Forcing QGC to use Mavlink V2 if vehicle supports it.