* Remove obsolete strings
* Tweak some static consts
* Reset LCD status to fallbacks

…and apply to MALYAN_LCD.

Allow the current command to complete when aborting an SD print, otherwise some commands (G28, G29, etc.) will cause trouble.

* Automatically reset stepper timeout in manage_inactivity

Any code that adds moves to the planner can skip resetting the stepper timeout. We can let `idle` / `manage_inactivity` reset the timer whenever it detects any moves in the planner.

* blocks_queued => has_blocks_queued

Fixes #10041

Fix #10004

Fix #9988

Followup to 7e386c7

Thanks Chuck Hellebuyck.

Manual moves now correctly include the workspace offset.

* SD Status auto-report feature
Feature Request #9751

- 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.

Reference #5367

- 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.

- 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.