Also show QGC position on map

Windows OS doesn’t disconnect port when you pull plug on USB. This
caused all sorts of problems with previous logic. New logic handles
this correctly.

It was kind of big...

Also merged MissionController and MissionEditorController into single
MissionController implementation

Mostly accomplished by delay loading Qml elements

For QWidget we will just use the Qt default font sizes. This removes
the extra QQuickWidget creation which breaks boot Qml Profiling