Reduce, clean up MINTEMP / MAXTEMP test code

Set defer delay back to false when exiting babystepping.

LIN_ADVANCE optimizations

Fix manual leveling coordinates

As pointed out by #5044

Correct grammar and translation in language_de.h

As requested in #5031

We don't want to have retract/prime movements done with LIN_ADVANCE, that's also true with simultaneously executed Z-hops.

With this formula, a start value for K for further fine-calibration can be calculated.

Save some PROGMEM in MBL G28

Patch BAUDRATE line in configs

As noted by https://github.com/MarlinFirmware/Marlin/pull/4971#issuecomment-252503295

Made Filament change Text sound like correct german.

Fix for the commit dc2cb84 (Revert acceleration limiting to avoid overflow)

・Add forgotten '\'

Fix freezing and MINTEMP Error with MAX31855 thermocouple

Fix DAC current code

Adapt Jerk / Speed code from Prusa MK2

Move platformio directories out of source tree

…and apply const to some method parameters

Patches for Stepper DAC and MAX31855

Sort out some header dependencies

This breaks the raw option, but in the future perhaps all planner moves
will be sent in raw form instead of logical.

As suggested by #4985

Small fix for the PR #4980 (LIN_ADVANCE bug fix and optimization)

Revert "Removal of PID functional range"