Fix Command M420

Add predefined AUTO_FAN_PINs to pins files

Don't trigger endstops that are actually Z2 or probe

#3631 broke z dual endstops. Solved by @Nocturnal42 in https://github.com/MarlinFirmware/Marlin/issues/5078#issuecomment-256572248

Fix for the PR #5088 (Handle M108 in M1 also with ULTIPANEL)

Fix bilinear grid constraints

Follow-up the PR #5087 (Fixed SERVO pins on Azteeg X3), etc

Followup to #5090

・Add header
・Adjust spacing

Fixed SERVO pins on Azteeg X3

Only issue MAXTEMP when heating

Fix for bilinear grid outside bounds

Handle M108 in M1 also with ULTIPANEL

Extend measuring range of thermocouple for MAX31855

Fix #4995 - M48/G29 on CoreXY maybe others?

Planner acceleration bugfix and speedup v2

.) Use already existing inverse_millimeters instead of /
block->millimeters.
.) Prevent overflow during acceleration calculation by checking if float
is necessary. Idea modified from Sailfish.
.) Save two uint32_t or even float multiplications by checking if
step[AXIS] has steps and if max acceleration is lower than accel. If
not, there is no need to check this axis.

Fix for the PR #5066 (Updated french translation)

MSG_INFO_PRINT_TIME is still being used

Fix for the PR #4553 (Save bytes for custom chars (Hitachi LCD))

Apply encoder reverse options to keypad arrows

[LANGUAGE] Update Czech (BLTOUCH and DAC strings)

Updated french translation

Warnings fixed redux

Reduce, clean up MINTEMP / MAXTEMP test code