Indeed the HAL does not need to be mucked around with to expose ATmega2560 pins not available as numbers on the MEGA board, I'll need to update the wiki with that tidbit and a reference to the pin-mapping comment in `fastio_1280.h`.

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>

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.

Fix message to long for 12864 display

- Drop `max_jerk` with `JUNCTION_DEVIATION`
- Add `max_e_jerk_factor` for use by `LIN_ADVANCE`
- Recalculate `max_e_jerk_factor` when `junction_deviation_mm` changes
- Fix LCD editing of `junction_deviation_mm`

Followup to #10920, addressing #10962

Fix #10761

Better encapsulation and considerably reduce stepper jitter

`DONT_SWITCH` got lost along the way. Replace it with `DO_SWITCH_EXTRUDER` and adjust the code.

As pointed out in #10731