Header optimization - Ports

[0Karakurt0]

I see that UDP port that QOpenHD listens on is defined twice in different parts of the code:

• in ./app/telemetry/tutil/openhd_defines.hpp
• and in ./app/telemetry/MavlinkTelemetry.h

I highly suspect that this is redundant and there is a way to source one from another, thereby simplifying the setup and eliminating potetional synchronization error.