From @rmoravcik at #9760

- This status screen uses the ST7920 character generator to greatly
  reduce SPI traffic and MCU load when updating the status screen.

- Has been tested with the RepRapDiscount Full Graphics Smart Controller
  but should work with any LCD that uses an ST7920 or fully compatible
  controller.

- This makes it look less like a dash (idea stolen from cjsoong).

- This will slightly reduce the SPI requirements for
  updating the progress bar.

- Also deleted old implementation files which had been renamed.

needed for UBL

Fix #9685

- Moved bed icon down when the machine is configured with two nozzles.

Fix #9711
Replacing #9731

Followup to #9503

Reference #5367

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

Fix #9471

Reference #9336

From @plainpylut in #9660

From #9286

Based on #9705

Implemented for LPC1768.

- The status screen uses the ST7920 character generator to greatly
  reduce SPI traffic and MCU load when updating the status screen.

- Has been tested with the RepRapDiscount Full Graphics Smart Controller
  but should work with any LCD that uses an ST7920 or fully compatible
  controller.