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

Fix-Servo-without-endstop/probe

More bits when encoderPosition is cast as signed

Fix home_offset handling and account for it in G29

Add CORE support to st_set_position and plan_set_position

Sorry for not having realized someone (me) redefined not existing servo pinns to -1, some lines above.
This is a simple error - not a feature.

Versions of Arduino IDE prior to 1.6.0 are no longer supported

ELAPSED / PENDING for rollover-safe time checking

Remove redundant text from MSG_ERR_REDUNDANT_TEMP