Reduce redundancy in MENU_ITEM code

Fix debugging of vector_3

Relating current_position, min_pos, max_pos, and home_offset

General cleanup of arc code

Update some comments in Configuration.h

Mesh Bed Leveling – Add lift between probes, comments, cleanup

Fix bug in lcd_preheat_pla0123 and lcd_preheat_abs0123

Throw an error if ENCODER_PULSES_PER_STEP < -1

Trying to preheat a non-existent extruder causes a crash.

Document some movement functions, rename a local

Support for "mechanical probe" with Allen Key as a special case

Update some comments in Configuration.h

Apply esenapaj 3479 and delta/scara position bugfix

More fine-grained control of LCD redraw

Fix: gcode_T using non-existent Z offset

Patch conditions for HAS_Z_MIN_PROBE

As noted by @snowzach in #3461

Add DEBUG_LEVELING output for gcode_T

General cleanup of language files

Additional Russian translations

Initialize stepper counts for Delta/SCARA

Fix a messed up ELAPSED instance

Thanks to @gans-AD – #3363

Fix Deutsch string errors, redundancies

Fix for M109 and M190 cooldown

Also removes the re-definition of now inside M190's while loop