* Add Multi Unit Support for Max7219 to bugfix_2.0.0

* Apply multi-MAX7219 to example configs

* Tweak some spacing, macros

Fix #11279, #11252

See https://github.com/MarlinFirmware/Marlin/issues/10949#issuecomment-398540498

When `INCH_MODE_SUPPORT` is enabled no default unit is set. This fixes it.

It takes too long to display the mesh data for large mesh's at startup.   We should consider ways to speed this up.
Perhaps it makes sense to display an entire row of the mesh instead of just one mesh point?

Prevent crash, on filament change, when printer is not homed

Co-Authored-By: kaimimue <kaimimue@users.noreply.github.com>

This will fix kill message on dual printer with 0 alignment offset

When `REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER` is defined and Re-ARM build is attempted, `u8g_fontutf8.cpp` includes `fontutils.h` which uses `abs()`.

However, `abs()` is defined in `stdlib.h` which is not included in `fontutils.h`, so compile fails with an error.

Include `stdlib.h` in `fontutils.h` so that `abs()` is defined before `u8g_fontutf8.cpp` needs to use it, resolving the compile error.

Signed-off-by: Jamie Bainbridge <jamie.bainbridge@gmail.com>

Co-Authored-By: nightgryphon <ngryph@gmail.com>

Co-Authored-By: nightgryphon <ngryph@gmail.com>

Make the endstop report method track endstop changes on its own.

Co-Authored-By: Aaron Griffith <aargri@gmail.com>

The <binary.h> header is not available in STM32 toolchain
and is not used anywhere in ultralcd_common_HD44780.h.
If it is used anywhere in HD44780 support for other platforms,
it must be included in the corresponding .cpp file directly
and put under appropriate conditional compilation directives
for the platform requiring it.

As I was unable to find such code, I consider the file unused
and hence remove the inclusion.

Co-Authored-By: ejtagle <ejtagle@hotmail.com>

Enable the endstop interrupts feature for LPC176x boards. Although Smoothieboard chose to use non-interrupt capable pins for their endstops, and this has been copied by clones, so they can't use it.

* Fix LCD_LANGUAGE options list formatting in config
* Remove 'cn' language option from list