Instead us a Toolbox concept which hangs off of QGCApplication

- Delete all old map code

- select active vehicle
- arm/disarm
- select flight mode

- Moved all MavManager functionality to Vehicle
- Updated all code to use Vehicle instead of MavManager
- Removed MavManager

- MultiVehicleManager is a Qml friendly replacement for UASManager
- Vehicle is a replacement for both UAS and AutoPilotPlugin