Change to match mavlink spec

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

Log download: Correct ownership and deleteLater

Refresh params after airframe load

Power: Fix trigger list

Fix home position distance to 0.0

Center hdop in toolbar, fix goto enabled state handling

gps: update drivers submodule