Includes support for battery 2 setup

Used to debug cache CRC misses.

Adding missing qgcView to QGCMapPolygonVisuals instance in SurveyMapVisual.qml

Buggy and no longer needed

* Flight modes still not implemented. Waiting on message change.
* Also includes various cauterization of UI things which should not be
available on high latency link.

It was broken when temperature translation was added in babbfbd1
The system wasn't quite setup to handle anything other than speed and distance. Changed so any arbitrary unit type can be converted to another.

It was broken when temperature translation was added in babbfbd1
The system wasn't quite setup to handle anything other than speed and distance. Changed so any arbitrary unit type can be converted to another.

Move  MAV_PARAM_TYPE to  MAV_PARAM_EXT_TYPE as we're now using the proper MAVLink version.

It did not like the use of the tr() macro within a static QString in the constructor.