* Fix G26's circle drawing...
This mostly catches the bugfix-v1.1.x branch up to bugfix-v2.0.0
I'll have to do something similar to get bugfix-v2.0.0 caught up to
bugfix-v1.1.x
* only use planner.leveling_active if appropriate
Some cleanup around 'lcd_bootscreen()' and 'lcd_kill_screen()'
Move 'lcd_bootscreen()' from `lcd_init()` to 'setup()' where it is cexecute exactly once. Saves 'bool show_bootscreen'.
Move the call of 'lcd_custom_bootscreen()' to the begin of 'lcd_bootscreen()'.
Move the delays into the related functions.
Move the picture loop around 'lcd_kill_screen()' into the function.
* [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
* Add M290 babystepping
* Allow `Z` for `M290`
* fix spacing
* Support BABYSTEP_XY in M290
* Not just Z
* Extend M290 for BABYSTEP_ZPROBE_OFFSET
* tweak
Changes to support NEOPIXEL LED strips
- Support for different NEOPIXEL as defined in Adafruit_NeoPixel.h
- ability to setup startup brightness
- ability to define sequential/non-sequential transition of color change during heating-up
- additional parameter to M150 P<brightness>