Select DOGM-displays automaticly.
Give hint where to find charsets.
Add '²' and '³' characters.

Only a missing ","... now it will compile again

Add FAN1_PIN and SERVO0_PIN

This reverts commit 4d5b0e2037.

Fix number of nozzle displayed in temperature menu.

Defined the charsets plus a default.

- Also partial cleanup of Marlin_main.cpp with a smidgen of Doxygen.

MSG_NO_MOVE = 'Kein Zug.' > 'Motoren Eingesch.' hat mich grau Haare gekostet.
Die englisch Meldung will sagen - Du kannst jetz am Extruder arbeiten, die
Achsen sind bockiert, die Motoren sperren die Achsen weil sie unter Strom
stehen, weil sie eingeschaltet sind.

to work out that this can't be resumed.

- Also adds a language string for the error.
- Also adds SERIAL_EOL as an alias for SERIAL_ECHOLN(“”)

Should be reading 4 x 4 PID values instead of 4 x 3

Extruder 2 and 3 was swapped

Update ConfigurationStore to always write dummy values for disabled
options, including FWRETRACT, DELTA, and SCARA. Update the EEPROM
version to “V15.” Also fixes a buffer overrun with axis_scaling in
Config_ResetDefault.

This won’t reduce the string storage in the end, but it makes the
language files smaller. Also removed remaining unused strings.