Changed to “f” string conversion from “g” to get better results

Also turn on MavlinkLogTest

Instead us a Toolbox concept which hangs off of QGCApplication

Also merged MissionController and MissionEditorController into single
MissionController implementation

- Also added new adjustMavlinkMessage support

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

Also fixed case where UASMessageHandler reported errors but walking
list turned up no errors