- Reimplement same behaviour as version 3.1 while resizing the window :
    Stretch the text area to fit the screen
- Change setting text from Alternate Instrument Panel to Vertical Instrument Panel

- Rename QGCInstrumentWidgetAlternate to QGCInstrumentWidget as it's now the default version
- Select  QGCInstrumentWidget as instrumentLoader source

The instrument widget layout is now a stack of :
- QGCAttitudeWidget
- Item that contain ValuesWidget
- QGCCompassWidget

Fixed flight widget position.

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

Add Distance to GCS to Vehicle FactGroup

Prevent clicks going through top level items