* Add support for MKS Robin TFT display

- Add support for MKS Robin TFT display and encoder for MKS Robin board.
- Generic 128x64 UI with x2 upscale is used (for now).
- Tested on MKS Robin TFT V2.0 with ST7789V controller.

* Move special characters to language.h
* Apply some naming standards
* Clean up menu item draw functions
* Rename some Temperature methods
* UI => ExtUI

* Encapsulate common LCD code in a singleton
* Depend more UBL code on UBL_DEVEL_DEBUGGING
  - Since most users don't need the debugging on at all times, this helps reduce the default build size for UBL by over 2K, a little closer to fitting on 128K boards.

* Fix Z value display
* Add HAS_PRINT_PROGRESS
* Alternative Info Screen option
* Add LCD_INFO_SCREEN_STYLE to example configs

Co-Authored-By: Giuliano Zaro <gmagician@users.noreply.github.com>

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`.

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

Fix #11183

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

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

Fix #10098

In reference to #5367. SWITCHING_EXTRUDER was not fully implemented for EXTRUDERS > 2.

Add compatibility with the original screen bord from Ultimaker 2 printer (UltiController v2.1 with the PG-2864ALBP I2C display)

adds setup for the original Radds Display+Controller+SD Card Reader PCB
http://doku.radds.org/dokumentation/lcd-display/