Vehicle change: All items removed
Vehicle add: Request sync is not already in progress

Defer loading and binding of mission editing QML components

3.0 fixes

Removing duplicated QGCQGeoCoordinate

Don't show board orientation after compass cal

Disregard spurious MISSION_ITEM

Rework mission lines + various mission-related bug fixes

Fixes ardupilot abbreviations for #3588

Remove animation to save perf

Bump joystick settle constant

Instantiating QSettings on the stack is quite expensive (full file read+parse each time) and this was done in a tight loop with mission items as they were dragged. Very slow.

PX4 mode cleanup

MockLink: Support multi-vehicle simulation

Move message area to top

Virtual joystick: Throttle no longer spring loaded to center

Mobile file dialog: Add logging

- Delay gps position for better testing
- Longer delay on home position