Remove ArduPilot Follow Me support from Stable

timer.start() and timer.stop() were breaking the 'running' binding of
the timer

Change follow to work above home altitude only

Support both relative and absolute FOLL_ALT_TYPE

This adds support for the new ArduSub 3.0 feature of automatically detecting
the thrusters directions and reverting the corresponding motor output if
necessary

Fix Follow X/Y calc from distance/angle

Disable closing app on last window close. This will close
the app on every widget spawned in QML that closes (MessageBox)

Advanced tuning hidden due to crash from Qt problem

Fix textRole usage for QGCComboBox

Update for missing params on rover

Follow page not showing up for Rover

Change jscript usage to make Qml compiler happy

Better handling of unsupported class/frame combinations

Update for 4.0 releases

ArduPIlot Follow Me setup

This is a bugfix due to changed signature in 3089da58

Enable ArduPilot motor testing

Use firmware version type, not vehicle type

Fix problems with ArduRover firmware parameter differences

Support 8 servos

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Safer handling of missing params

Visual accel cal

Better visual spacing

Update for correct simple parameter semantics

Simple and Super-Simple flight mode support