Fix number of nozzle displayed in temperature menu.

Clean up some formatting

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

Add bq Witbox 3D printer

Make EEPROM storage consistent

Fixing wrong pin to heater extruder 2 <-> 3

- 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.

Remove language strings that only add a number

Formatting cleanup of quiet sources

Rename lastnr to autostart_index and...

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

Split up pins.h to make pins more manageable

Remote has diverged, so pull

Also fix analogInputToDigitalPin so it uses proper C hex notation

There’s no need to ask users to uncomment Max Endstop pins when they
have them. These will be set to -1 later if the endstop option is
disabled.

#1405 includes some changes to pins.h for a 4th extruder. This commit
applies those changes. It also deals with a possible problem with
SENSITIVE_PINS.

Hopefully this is helpful to organization and future expansion….

Also fix analogInputToDigitalPin so it uses proper C hex notation

EEPROM data not aligned

Moved #endif to allow filament settings to print.

Added PIDTEMP dummy write to align EEPROM read/write operation.

repair Bootsplash

Fixing the language files for the 4th extruder