This PR is cherry-pick from 90b9a1aa7d in PR #5020.
@MxBlu copied quantum/rgblight.c to keyboards/mxss/rgblight.c on July 8, 2018. At that time, I think it would be better to copy quantum/rgblight.h at the same time.
Because if someone makes a change to `quantum/rgblight.[ch]` that is incompatible with the past, it may cause problems with the compilation of keyboards/mxss.
(Like when I changed the prototype of the `rgblight_effect_XXX()` functions of rgblight.c in PR #5020.)
* Add default value for IS_COMMAND for COMMAND feature
* Cleanup and consistency
* Update Templates to reflect change
* Fix IS_COMMAND in template
* Fix IS_COMMAND define
* Use consistent IS_COMMAND block in templates
* Remove unnecessary `#undef IS_COMMAND` directives
* Fix compile issue on orthodox
* Reomve IS_COMMAND option for newer boards
* Remove all existing definitions of IS_COMMAND if they use default LSHIFT and RSHIFT setting
* Remove a couple of additional IS_COMMAND defines
* Remove remaining redundant IS_COMMAND definitions
* Remove #undef IS_COMMAND from orthodox:drashna and whitefox:konstantin
* Remove multiple empty lines in modified config.h files
* Update additional boards
* Reomve IS_COMMAND from newer boards
* Update Alice keyboard
* Remove IS_COMMAND from additional boards
Jan 24th edition
* Change rgblight_get_mode's return type to uint8_t.
Since rgblight_get_mode() is just returning rgblight_config_t.mode,
it should match rgblight_config_t.mode's type: uint8_t.
* Update rgb_matrix_get_mode to return uint8_t.
* Added basic MxSS support
* Fixed split RSHFT for ISO layouts
* Updated readme.md for MxSS
* Added initial support for individual control of front RGB LEDs
* Changed RGBLED color selection to work using hue and saturation rather than RGB
Added code for LED state change on layer change
* Avoid needing an entire 8 bits to store the brightness value
* Added custom keycodes, along with their handlers
* Added EEPROM storage for front LED config
* Fixed up ability to use QMK Configurator and updated readme.md
* Applied suggested changes from pull request: https://github.com/standard/standard/issues/452
Updated name in license descriptions
Updated layouts to snake case
Corrected mistakes in info.json
Updated layer_colors to a weak attributed array in mxss.c
* Defined a new safe range for custom keycodes in keymap.c
* Fixed up issues with front LED
Fixed LEDs not always updating in indicator mode
Added support for the other RGBLIGHT modes in RGB mode
* Attempted fix for ISO layouts for QMK configurator
* Added basic MxSS support
* Fixed split RSHFT for ISO layouts
* Updated readme.md for MxSS
* Added initial support for individual control of front RGB LEDs
* Changed RGBLED color selection to work using hue and saturation rather than RGB
Added code for LED state change on layer change
* Avoid needing an entire 8 bits to store the brightness value
* Added custom keycodes, along with their handlers
* Added EEPROM storage for front LED config
* Fixed up ability to use QMK Configurator and updated readme.md
* Applied suggested changes from pull request: https://github.com/standard/standard/issues/452
Updated name in license descriptions
Updated layouts to snake case
Corrected mistakes in info.json
Updated layer_colors to a weak attributed array in mxss.c
* Defined a new safe range for custom keycodes in keymap.c
