* Reduce size of the YamlNode structure in FLASH storage.
Fix compiler warning.
* Further reduction of FLASH used by YamlNode structures.
* Reduce size of sensor definition arrays and audio tone volumes array.
* - all telemetry sensor name definitions in one place (untranslated.h)
- all telemetry sensor name definitions follow the naming convention STR_SENSOR_<sensor>
- eliminated one redundant definition
- editorial updates to telemetry protocols code to reflect the naming convention changes
- re-introduced translations in da.h (STR_SENSOR_THROTTLE and STR_SENSOR_SPEED)
- re-introduced translation in it.h (STR_SENSOR_GPSDATETIME)
- re-introduced translation for fr.h ( STR_SENSOR_BATT)
- saved 160 Bytes of flash
* removed obsolete translation
saved 280 byte flash memory in total
* finally removed extern const char STR_MENUTEMPLATES[]; definition
adjusted da.h, fr.h, it.h local sensor name definitions to naming conventions STR_SENSOR_<senosr>
* corrected merge
removed obsolete #ifdef
* some more obsolete ones
* added TW and CN translation for TR_PERIOD and TR_INTERVAL
fixed problem in /radio/src/gui/colorlcd/fullscreen_dialog.cpp preventing builds for CZ, IT and FR languages
* transferred respective OpenTX updates to HoTT telemetry
* integrated LUA function flushAudio from OpenTx
* sensor names moved to “untranslated.h”
reverted *.h.txt to original mainline content
removed leading "Z" in sensor name defines
