timer.start() and timer.stop() were breaking the 'running' binding of
the timer

This adds support for the new ArduSub 3.0 feature of automatically detecting
the thrusters directions and reverting the corresponding motor output if
necessary

This is a bugfix due to changed signature in 3089da58

Get rid of QGCView, QGCViewPanel and FactPanel. All messages and dialogs are now handled in the root window.