Result see: https://www.youtube.com/watch?v=tdu7J0i-c4g
Loop is executed several times per display update.

- Document `manage_inactivity` function
- Allow `EXTRUDER_RUNOUT_PREVENT` to work with all extruders
- Use faster `memcpy` for copying coordinates

Just a simple #ifdef Z_PROBE_ENDSTOP to define the pin for it. Also has
a couple commented lines for switching Z_MIN_PIN if needed.

It wouldn't compile because of this line in temperature.cpp it turns out
it was just a stray ( that didn't line up with the previous lines so I
just made it in line with the rest and it compiled fine.

max_feedrate is in mm/s. line_to_destination needs a feedrate in mm/min because there is feedrate/60.

The automatic versioning system extracts a
build version number from the SCM system

That versioning information is written to the file
_Version.h, a file that is NOT preserved in the SCM.

If such a file will be present,
we include it here to utilize the parameters
that are defined therein.

related to current_position[Z_AXIS] and retract_zlift.

'+ =' -> '+='

Fix for #1786

- Add comments documenting `thermal_runaway_protection`
- Add an enum for the thermal runaway states
- Add macros for temperature helper functions
- Fix a glitch with the z probe sled in homeaxis

Catch unlikely but possible error and head crash when using
Z_PROBE_REPEATABILITY_TEST

* Use "G29 S3 Xn Yn Zn.nn" to modify bad probed point manually
* Changed manual Z steps from 0.05 to 0.025 and made brought it to Configuration.h

is not used.

some people are starting to ask why homing is so slow. this is the old standard hard-coded value.

for when no LCD is defined.
Fix for #1770.

Updated documentation in Configuration.h.
Cleaned up and commented some code relating to Z_PROBE_ENDSTOP.
Separated Z_MIN_ENDSTOP and Z_PROBE_ENDSTOP completely.