USB baud rate settings added

Few UI issues solved

Now we have all communications functionalities implemented (for first public release).

• Drone: BT USB (host mode)
• GCS: TCP / UDP (local broadcast mode)

UDP server is not able to pass routers in this mode!

Drone Client supports now Bluetooth and USB connections.

• USB connection works using the USB host mode - so you may need a docking station.
• TCP server address and port is given in the System Log.