Fixes #1657:
* corrected varioLimitCenterMin range
* removed varioLimitMinOff checkbox (it is not used anymore in any radio)
Merge pull request #1751 from opentx/projectkk2glider/issue_1657_vario_limits

Fixes #1657:
Conversions shift fixed
New trainer modes:
- Master / SBUS module
- Master / CPPM module
- Master / SBUS in battery compartment
Thanks to Mike for this feature!
Master/SBUS Module now working
Now SBUS / Battery compartment works!
Translations updated