As discussed in https://forum.lvgl.io/t/localized-keyboard-layouts/6734, this adds further `..._USER_N` keyboard modes that can be used to implemented more keyboard layouts for locales that need more than 4 layers.
As discussed in https://forum.lvgl.io/t/localized-keyboard-layouts/6734, this adds further `..._USER_N` keyboard modes that can be used to implemented more keyboard layouts for locales that need more than 4 layers.