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>

[2.0.x] Shorter Z raise between multiple probes

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>

[2.0.x][HD44780] Remove unused include

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.

Also fix use_example_configs

[2.0.x] Use 'float' instead of 'double' maths

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

[2.0.x] No M914 or SGT with non-sensorless axes

[2.0.x] Tronxy X3A configurations and thermistor