・Add CASE_LIGHT_PIN into pinsDebug.h

implemented G-Code M355 into Marlin

The extrusion speed was wrong due to a not high enough precision of
esteps to XY steps, therefore now the target float values are used to
calculate the ratio between XY movement and extrusion speed.
The e_speed_multiplier8 was replaced by an absolute multiplier called
abs_adv_steps_multiplier8, therefore one multiplication and bitshift can
be saved inside the stepper ISR. Due to this, also extruder_advance_k is
better suited inside the planner and not the stepper files any more.

see detailed  description in PR #5118

I stumbled across a name change that'll be used a lot so I'm updateing
the name list.

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

Followup to #5090

・Add header
・Adjust spacing