Edited the European part of 'ISO10646_CN.fon' to match the existing fonts.
Added Chinese font to make_fonts.bat
Created 'dogm_font_data_ISO10646_CN.h'
Added Chinese to 'language.h'
Added 'language_cn.h' with some minor edits.
Added Chinese font in 'language_en.h' to not fall back to European font.
Added cn to 'Configuration.h'
Changed WIDTH to LCD_PIXEL_WIDTH and HEIGHT to LCD_PIXEL_HEIGHT to have more descriptive names.

In 'dogm_lcd_implementation.h'
Added Chinese Font
Made 1 pixel more room for the larger Chinese font on the status line.
Changed geometry of the 'select bar' by one pixel.
Changed the way the position for values and postcars are set.

With these changes the output of `M503 S0` is all you need to restore
the EEPROM. Building on this it is straightforward to save and restore
the EEPROM state using the SD card or external GCode file.

- Added `M145` to set “heatup states” for the LCD menu
- Added `M420` to toggle Mesh Bed Leveling
- Added `M421` to set a single Mesh coordinate
- Extended `Config_PrintSettings` with added M codes
- Cleaned up some comments here and there

M111 - Debug Level

- Add `M111` as a standard option to set the debug level
- Implement `DEBUG_ECHO` in `process_commands`
- Other debug levels (e.g., `DEBUG_DRYRUN`) need more work

Rename files to move them in the IDE

Fix BEEPER duration

Add a warning for DISABLE_[XYZ] options

Raise Z for M401 and M402

Use millis_t for progress_bar_ms and expire_status_ms

G4 shows status message only if no message is set already

Apply zprobe_zoffset in axis_is_at_home

Add variant for MAX6675 in M104

- Address issue raised in #1961

Remove set-coordinate extension of G28

Max endstopp

Macro steppercpp

Else will throw error:
@:0 B@:0
Error:No thermistors - no temperature
[ERROR] Error:No thermistors - no temperature

when no bed is defined

delete some tabs

Ensure the probe offset will always be included when homing Z.

Include axis parameter to ultralcd's line_to_current

Fix homing of YZ with DUAL_X_CARRIAGE

Fix for #1946

Add DISPLAY_CHARSET_HD44780_CYRILLIC as alternative in SanityCheck.h

More Beeper clean up

Add M410 QuickStop command

c'n'p ftw :/