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

Rewrote editor to be performant enough to support typedown

This can happen on slow touch based systems

* Fix long description meta data

* Add reboot required

This allows you to arm

- Mobile large
- Desktop default

Was too hard to click

Remove spurious debug message.