Hotfix: Ensured there are never two filters running at the same time if auto-magic happens via USB link

Lunchtime HOTFIX: Bring back USB console to operational, allow single-USB connection operation via QGC

Minor cleanup of comments for HoTT messages.

Driver for the reading Graupner HoTT sensors (such as their ESC range) via the telemetry port

sdlog2: Global Position Set Point message added

Don't leave RX in bind mode if console open fails

ubx driver cleanup and improvments

Don't leave RX in bind mode in the unlikely eventuality that console
open fails

ubx: SVINFO parsing optimized and message rate increased, CPU consumption reduced in 6 times, ~0.3% now.

Major ubx driver cleanup: few pages of code removed, send update only when full navigation solution received

Arm/disarm and SAS modes order safety fixes

- Use distinct common symbols for px4io and px4fmu device files, and use
instead of hardcoded filenames
- Use common symbols defining px4io bits consistently between px4fmu and
px4io builds.