* Apply #pragma once in headers
* Adjust some thermistors formatting
* Misc cleanup and formatting

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

Some languages will need to be updated for proper phrasing

* Unify M600 and M125 pause features
* Cleanup per thinkyhead's comments
* Rename filament_change_menu_response to advanced_pause_menu_response
* Include HAS_BED_PROBE in QUIET_PROBING
* Update gMax example file
* is_idle() is out of scope without the braces
* Convert FT-i3-2020 to Advance Pause names...
* Allow pause even if not printing

updated the RCbugfix release with additional Dutch translations

- Japanese and Chinese still need update

・Remove MSG_END_HOUR and MSG_END_MINUTE from all the language files
・Change from MSG_INFO_TOTAL_PRINTS to MSG_INFO_PRINT_COUNT in German
file

Make MAPPER_NON the fall back mapper - if no other is defined.
One list less to maintain.

・Remove abolished strings (MSG_NOZZLE1, MSG_NOZZLE2)
・Remove duplicated strings 
・Arrange the strings in unified order
・Adjust spacing
・Remove some comments in Japanese files(follow-up the PR #3560)

The most part of these changes were salvaged from closed my PR#3550.

Optimised all added messages to fit within 16 Characters