Harden mission protocol to lost packets

Pile of GeoFence fixes

Improve Sub's leak sensor labeling for better clarity

Show mission time in minutes

Retry in all the right/possible places. Don’t freak out about things
coming in unknown sequences.

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.

Correct altitude usage for Change Altitude

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