[2.0.x] Revert default BABYSTEP_MULTIPLICATOR to 1

[2.0.x] Arduino Due XON/XOFF implementation

Alos includes emergency parser and configurable TX/RX buffers for Arduino Due.

This is the ONLY way to be able to override ISRs stolen by the Arduino Runtime, such as Serial or USB device interrupts. This feature is needed so Arduino modules can be replaced and enhanced.

Instead of using const char, it is better to use uint8_t

Although this is an external contribution, clean up anyway to stop seeing it in global searches for typical flaws.

[2.0.x] G33 Autotune calibration update

[2.0.x] Improved Firmware Retraction logic

Thanks @SCiunczyk

[2.0.x] Add M290 Babystepping (extended)

Add a single default travis test for lpc1768 to catch build errors

[2.0.x] Bring NEOPIXEL_LED into parity with 1.1.x

2.0.x - save 1400 bytes of FLASH by using reduced font for some languages

* Re-Print of same SD Memory Card file with single click

* Re-Print of same SD Memory Card file with single click
* This is the bugfix-v2.0.0 version of  https://github.com/MarlinFirmware/Marlin/pull/8104

* Merging early because of build failures.  See #8105

* Make LPC1768 pinmapping not specific to Re-ARM

* Add HAL_PIN_TYPE and LPC1768 pin features

* M43 Updates

* Move pin map into pinsDebug_LPC1768.h

* Incorporate comments and M226

* Fix persistent store compilation issues

* Update pin features

* Update MKS SBASE pins

* Use native LPC1768 pin numbers in M42, M43, and M226

Removed duplicate entry in gitignore

* Add AZSMZ Mini

* Remove tabs, adjust spacing

* Renumber boards to group by family

* Patch up spacing

* Tweak

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

gitignore update

[2.0.x] Simplify mesh bounds config

Clean up HAL trailing spaces, MKS SBASE pins

* Enable hardware serial ports on LPC1768

* Fix compilation errors with other HALs

* FIx order of includes in LPC1768 HAL main.cpp

* Add support for RX_BUFFER_SIZE and TX_BUFFER_SIZE options in Configuration_adv.h

Fix some config verbiage

[2.0.x] Fix position sync in M600 pause/resume

* Add GFX overlay to UBL mesh edit

Fixed misplaced HAS_TEMP_BED in dogm_bitmaps.h

rename _lcd_babystep_zoffset_overlay to _lcd_zoffset_overlay_gfx and move it out of BABYSTEP_ZPROBE_OFFSET to we can use it for over things. Add this function into UBL mesh edit screen.

update all Configuration.h to add ENABLE_MESH_EDIT_GFX_OVERLAY

* Add Sanity to UBL  insanity

Need to check for DOGLCD  otherwise error out.

set_destination_to_current() changed to set_destination_from_current()

set_current_to_destination() changed to set_current_from_destination()