Addressing #8166

[1.1.x] Only show custom bootscreen once

* [1.1.x] Fix NO_MOTION_BEFORE_HOMING unwanted behaviour

NO_MOTION_BEFORE_HOMING should prevent XYZ movements only when homing is not done.
E axes should be allowed

* Update Marlin_main.cpp

* Update Marlin_main.cpp

* Update Marlin_main.cpp

[1.1.x] Kinematic clamp_to_software_endstops

[1.1.x] Simplify SD_REPRINT_LAST_SELECTED_FILE

[1.1.x] Define a default SERVO0_PIN for Anet 1.0

[1.1.x] Cleanup for SD Print Again

Followup to #8123 - to match 2.0.x changes

[1.1.x] Dual endstops XYZ

* Fixed M303 thermal protection

The temperature sanity checking logic was not being applied during M303
(pid autotuning) because instead of setting a target temperature, it
directly manipulated the pwm values.  When PIDTEMP/PIDTEMPBED is
enabled, PWM values rather than the target temperature determine whether
the heater is on.  I changed this to look directly at the PWM amount
when pid is enabled.

* Turn off heaters on M303 error

Currently, PID autotuning stops if it overshoots the temperature by 20C
or if if the temperature does not change for 20 minutes and it times
out.  I added calls to disable the heaters in these scenarios.

* Removed unnecessary if statement.

Added changes suggested by GMagician.

* Update temperature.cpp

* Update temperature.cpp

* Update temperature.cpp

(1.1.x) serious bug G33

[1.1.x] Revert default BABYSTEP_MULTIPLICATOR to 1

[1.1.x] Add MKS GEN L board

* auto tune calibration parameters

* solve warnings

* Tweaks to formatting

* review Thinkyhead

* Error

[1.1.x] Improved Firmware Retraction logic

Thanks @SCiunczyk

(bug fix) 1.1.x - save 1400 bytes of FLASH by using reduced font for some languages

* Initial conflict resolution

All previous items resolved:
- Use of ELAPSED() on timer code
- Switch to use of defer_return_to_status=true as much as possible
- Update & Clean Up of Max7219 routines

* Resolve non-SD case in ultralcd.cpp

* use reduced sized font for some languages

* Fit Portuguese language files to existing scheme

* Rename language_pl-DOGM.h to language_pl_utf8.h

* Rename language_pl_utf8.h to language_pl-DOGM.h

* Update dogm_font_data_ISO10646_1.h

* Update dogm_font_data_ISO10646_1.h

[1.1.x] Add MKS MINI 12864 support to GT2560

[1.1.x] Simplify mesh bounds config