[2.0.x] MKS Sbase - add servo pin definitions and add directly controlled PWM

Change G26 and G29 bit function names to avoid HAL name collision

[2.0.x] Fix for #8525 and other cleanup

[2.0.x] G33 probe error handling

Fix #8561. Fix #8562

[2.0.X] U8Glib follow up

Travis fix - only allow ultralcd_st7920_u8glib_rrd_AVR.cpp to compile when ST7920 selected

Travis is having problems at:  https://github.com/MarlinFirmware/Marlin/pull/8560   

So...   doing a direct commit to get things correct.   Bugfix_v1.1.x does not have this bug.  Nothing needs to be done to that branch.

MK2_MULTIPLEXER does not require E2/E3 stepper pins

[2.0.x] Followup for MESH_EDIT_GFX_OVERLAY

[2.0.x] Implement NANODLP_Z_SYNC for 2.0.x

These changes may need to be warmed over.  I tried to fix things with
the least amount of disruption.   I just wanted to get the bugfix_v2.0.0
branch working for people again.

[2.0.x]  Adapt G26 to work for all meshes