Added altitude change buttons

Buttons should not repeat when held,
- 10 button should disable when desired altitude is <=10
-1 should allow user to go to 1m. No less.
hide the mission control functionality for now.

Was intended to allow user to record mission in flight. Not implemented yet in Java.
Added Quad icon for disconnected state - grey
Updated Art for Status Menu Bar
Implementation of Flight Timer

Switched to VFR HUD message. Timer now works to spec. Added reset menu item.
Action bar formatting
Fixed missing parameter
merged with latest from upstream.