Break out SurveyMissionItem->ComplexMissionItem class hierarchy

Remove Status Details widget

Major re-architecture of json mission item editor support

Joystick config: Fix scrolling

Quickly handle downloading scattered gaps

This also fixes scrolling

[Mission stats in Survey Feature]: check when survey item is first mission item

Fix active binding

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.