Beta2 of mavLink enabled firmware is ready.

Changes:

-Added menu for FC PID tuning (Basic)

-Added menu for FC Fence management

-Fixed RSSI bug when working with Pitlab Autopilot.

-Fixed bug in RC monitor settings imported from previous OSD version (2.60).

Note: RC monitor settings changed in  layout designer in FPV_manager Beta1  need to be  fixed/corrected  in FPV_manager Beta2  to work properly!