Allow `ENABLED`, `DISABLED`, `PIN_EXISTS`, and `BUTTON_EXISTS` to take multiple arguments. Also add:
- Alias `ANY(...)` for `!DISABLED(...)`
- Alias `ANY_PIN(...)` for `PIN_EXISTS(a) || PIN_EXISTS(b) ...`
- Alias `EITHER(A,B)` for `ANY(...)`
- Alias `ALL(...)` and `BOTH(A,B)` for `ENABLED(...)`
- `NONE(...)` for `DISABLED(...)`

- Ensure `MarlinUI:get_progress` is defined for `ExtUI`.
- Fix for `BACKLASH_SMOOTHING` with small segments.
  `BACKLASH_SMOOTHING` with extremely small segments failed to fully correct due to the correction factor being rounded down. Rounding up ensures the entire backlash will converge to zero even for small segments.
- Add pinout for the beta revision `EINSY_RETRO`.
- Update soft endstops with tool offsets (for toolchange et. al. move clamping) (#12568)

Co-Authored-By: shitcreek <45380455+shitcreek@users.noreply.github.com>

Currently, Pause of an SD-Memory card print does not work.    This has been verified to resolve the issue by multiple people.   

I understand more work needs to be done to resolve some of the concerns...

Followup to #12551, addressing #12566

* Optimize target_extruder, ignore T with mixing
* Give G-code Tn parity with tool_change

Fix #12362

In reference to https://github.com/MarlinFirmware/Marlin/pull/12098#issuecomment-436231690