Add support for geofence return point. 

Add support for geofence return point. Also fixed a bunch of bugs in geofence and rally point support.

Upstream stable merge

ArduPilot: Cube black service bulletin check

Stable: Fix tagged release builds. PDB artifacts

Relative path to pdb

Fix no serial and android builds

Fix tagged release builds. PDB artifacts

Update

Check for CubeBlack service bulletin

Pattern Preset support

Fix incorrect isManualCamera logic

Fix initialization

Pattern Preset support

the battery and distance of structure scan always show 0

Stable merge

Stable merge

Offline Maps: Allow custom build override of min/max zoom levels, max tile download

Fixed Wing Landing Pattern: Use standard Altitude Mode labeling

Fix: Tile errors were reported twice

Consistent Altitutude Mode labelling in all complex items

Use consistent Altitude Mode labeling

Use new extraUnitField

Show extra unit in small font

Reduce space between graphic and text

Use standard Altitude Mode labeling

Add new file

Fix double tile download error reporting

Prevent double reporting of tile download errors

Offline Maps: Allow custom build settings overrides

Object ownership handled by SettingsGroup base class

ArduRover: Add Follow mode

ArduPilot: Add Follow mode to Rover

Add SimpleROV-5 frame for Sub