Co-Authored-By: the-real-orca <stephan.veigl@gmail.com>

Fix issue mentioned at https://github.com/MarlinFirmware/Marlin/pull/13587#issuecomment-481737509

- Remove a re-paint of the status screen on stepper timeout, which would cause a garbled LCD with `LIGHTWEIGHT_UI` and could interrupt whatever else the user might be doing in a submenu (such as playing games!)
- Use the helper function to reset stepper timeout.

Co-Authored-By: klcjr89 <klcjr89@users.noreply.github.com>

Remove extra STM32 config dir #13622

- Assign helpful names to the terminals.
- Bring terminal forward so error messages are seen.

- Change encoder position to 16-bit integer.
- Fix `SD_REPRINT_LAST_SELECTED_FILE` when the screen is scrolled.