@MarlinFirmware/language-team my changes for the German language. Feel free to improve :)

Change cancel_heatup to wait_for_heatup

Clean up, simplify and generalize the Allen-key-probe code.

Move and extend axis_unhomed test to deploy/stow_z_probe().
Move and extend position store/restore to deploy/stow_z_probe().

Now all kinds of probes can use the 'E' parameter in G29/M48.
Allen key probes can be used now for grid and 3-point levelling.

Deploying the Allen Key probe uses big moves in z direction.
Too dangerous for an unhomed z-axis.
Throw a compile time error when we try to configure an
Allen Key probe homing to z-min and having no other z-min-endstop.

The `PROBE_IS_TRIGGERED_WHEN_STOWED_TEST` is able to detect if a probe is
successfully deployed/stowed.
It was part of the Allen Key probes code only.
Now the function is generally available.

Currently this test is compulsory for Allen Key probes to not alter the used behaviour
If you want to add the test for an other type of probe simply add
```
#define PROBE_IS_TRIGGERED_WHEN_STOWED_TEST
```
to your config.

There was an hidden extra move after the scripts. This is configurable now.
Added the extra moves to the relevant configs.

Add a optional feedrate parameter to `do_blocking_move()` and its companions.

Allow the command queue to be cleared by commands, lcd menus

Make raise for probe deploy relative in homeaxis()

MBL typo

Make raise for probe deploy relative in homeaxis()
by setting `current_position[axis]` to zero later.

Introduce M108 cancel wait for heatup/cooldown of the hotend and bed

Additional patches for gcode_T position change

References to millimeters in code comments need an update

Remove wants_to_cool uninitialized warning

Remove wants_to_cool warning

Fix position adjustment with gcode_T and MBL

Shorter labels for Print Stats info

Add Velleman K8400 board support.

Fix compiler warnings for static screens

Supports both dual and single head printers (with the correct config).
Includes community sourced feed rate fix.

Rename / move files.

Remove redundant definitions.

apply correction when swtiching from MBL to physical in G28 X

Follow-up the PR #3662 (Rewritten FILAMENT_CHANGE_ENABLE feature)

・Update a forgotten Configuration_adv.h of Cartesio

Rewritten FILAMENT_CHANGE_ENABLE feature

Printer information menu

Includes:
  *firmware version / branch / date.
  *extruder count
  *board information (name, serial details, power supply type)
  *thermistors (names, min/max temperatures)
  *printer statistics (PRINTCOUNTER details)

Thanks to @thinkyhead for contributions.