RGB_
* Remove deprecated `RGB_` and Mouse keycodes * Update old mouse keycodes, 0-9/A-M * Update old mouse keycodes, N-Z & layouts * Missed some stuff
* `KC_SLCK` -> `KC_SCRL` * `KC_NLCK` -> `KC_NUM`
Co-authored-by: Drashna Jaelre <drashna@live.com>