VTOL transition switch UI

* Add support for another board

* Added a 2nd custom board

GStreamer Setup: Fix xcopy problem

Update Windows and OSX to specify 1.5.2 usage, plus links.

Seems to work differently on appveyor build

GStreamer windows setup

Use human appropriate values for bytes in log downloader

Save _mainIsMap state persistently

Hide radio rssi icon from toolbar if radio is not supported

Also report the current transfer rate in the currently downloading status to help expose regressions in performance.

Add RC-radio-like exponential to joystick RPY axes

Doxygen qml support

gps: update drivers submodule

Fix plugin semantics for ArduSub additions

Add mock link for ArduSub Firmware Plugin testing

Also updated some docs

Restrict map providers for iOS.

Update config settings

View naming