more conversion stuff

some fixes and added area unit drop down

Conflicts:
	src/MissionEditor/MissionItemStatus.qml

removed comment

finish unit conversion

correcting typos

Map Reset Dialog

Adding a dialog telling the user the map cache database has been reset.

Survey no longer hidden behind setting

Fixes to Offline Map Cache

PX4 MAV_CMD_NAV_LOITER_TO_ALT and cleanup

Motor Setup/Testing support

Coord fix

Warn user on requiring 1.4.1 or above version

Warn user on requiring 1.4.1 or above version

more qgroundcontrol -> QGroundControl renaming

Plan: Copy coordinate frame from prev waypoint as well

Update development version from git

Radio Cal: Fix channel monitor when reversed

-fixes #3756

Fixing a crash bug where a leaving vehicle was not being properly 

[APM] [Copter] Ch6 tune

Radio Cal: Fix reverse throttle check

Remove fading help text

Channel 6 Min Max

Channel 6 Tuning for APM Copter in tuning section

Remove Colon in Label

In Flight Tuning label