Generate per-language translation sources (#806)

This generates dedicates Translation.cpp files for translation language
and derives all language-specific data from them.

The Makefile is extended to also take care of generating these source
files.
This allows reuse of nearly all object files between builds of different
languages for the same model and regenerating the translation sources if
necessary.
This speeds up the release builds and the normal write-compile-cycle
considerably.
It also eliminates miscompilations when manually building different
languages.

source/Core/Src/Settings.cpp

@@ -67,9 +67,7 @@ void resetSettings() {
   systemSettings.autoStartMode     = AUTO_START_MODE;    // Auto start off for safety
   systemSettings.lockingMode       = LOCKING_MODE;       // Disable locking for safety
   systemSettings.coolingTempBlink  = COOLING_TEMP_BLINK; // Blink the temperature on the cooling screen when its > 50C
-#ifdef ENABLED_FAHRENHEIT_SUPPORT
   systemSettings.temperatureInF = TEMPERATURE_INF; // default to 0
-#endif
   systemSettings.descriptionScrollSpeed         = DESCRIPTION_SCROLL_SPEED;   // default to slow
   systemSettings.CalibrationOffset              = CALIBRATION_OFFSET;         // the adc offset in uV
   systemSettings.powerLimit                     = POWER_LIMIT;                // 30 watts default limit