UART3 Debug/SPORT modes
[all] Issue #626 fixed
Merge branch 'next' of https://github.com/opentx/opentx into next
[all] Issue #627 fixed
Merge pull request #634 from opentx/bsongis/Taranis_UART3_modes

UART3 Debug/SPORT modes

Looks all good!
Update DONATIONS.txt
[Taranis, Sky9x] Wav files played even in silent mode.
Update DONATIONS.txt
[Taranis] 6pos multiswitch adjustments
Companion didn't compile properly!
Merge branch 'next' of https://github.com/opentx/opentx into next
[Taranis] 6pos multiswitch fix
Chenged SPORT to S-Port in all translation files.
Merge pull request #641 from opentx/driver33/sport

Driver33/sport
Remove Virtual SP2UART choice for serial port for now, sync translations (Debug)
fixes in both companion and opentx new string in companion helpers that need to be transfered into other translation files