Vehicle Messages indicator is now part of Main Status Indicator

[DonLakeFlyer]

• Vehicle message indicator was taking up valuable toolbar space even when there were no messages
• Now message indicator shows as a smaller icon as part of the main status toolbar item
• Also main flight status text ("Flying") is no longer displayed in a marquee control, just regular text now.
• All of this makes the toolbar shorter in general which is critical on small screens
• Most of the above is a rearranging of the deck chairs on existing qml code no real new functionality
• I also fixed a crashing bug in uploading an empty plan to a vehicle