* And and fix _noeeprom functions to many of the RGB Underglow functions
* Many functions are unnecessarily calling the eeprom write code. The toggle/enable is command is especially guilty of this, as it writes to EEPROM 3 times. But rgb mode writes twice, every time it's called. And init resets the rgb eeprom range and then writes back to it twice!
* Fixed the rgblight_sethsv_noeeprom to work as expected, by moving a lot of the code to a helper function.
* Added a noeeprom function for mode, enable, disable, and toggle functions. (didn't bother for increase/decrease stuff, and didn't add new keycodes)
* Add to predefined colors list
* Add new functions to manual/docs
* Update RGB Sleep feature to use _noeeprom
Because that's exactly what it should be doing, actually!
* Update feature_rgblight.md
I got caught out with this as most color pickers use a percentage NOT 0-255 for this number
* Amended description
Woops! Was focused on s/v not being a percentage i got h wrong.
This commit adds a new keycode `RGB_SMOD` which is the same as `RGB_MOD` (cycle through all modes),
but when it is used in combination with shift it will reverse the direction.
* Address #1689 by using a formula to define the breathing curve and exposing defines to control the shape of the curve.
* Tweak the behavior of breathing for clueboard
* Allow the knight animation to be restricted to a portion of the LED strip
* Add keys for jumping directly to particular animation modes
* Remove orphaned break statements
* Tweak the `RGB_MODE` buttons so they cycle through the same mode.
* small indentation fix
Takeshi ISHII