Remove the concept of reserved buttons for manual control

Add gotoFlightMode method

Don't starts streams from QGC side. Assume firmware side does the right thing.

FirmwarePlugin: Issue a warning upon connecting if the firmware in use is not using a stable release

Move ArduPilot preflight check handling to generic QGC

Use component id from heartbeat

Also added new FirmwarePlugin::brandImage support

_finalize methods need information which is not available if all you
have is a mavlink_message_t

- GeoFence support comes from plugin
- Circle fence support
- Better param support

Also filter solo version string