Revert "Revert "Revert "Fix removal of backlight settings"""

This reverts commit 9b552dca6e01758de5774139339d5c2f2241a086.
Revert "Revert "Revert "Button & keyboard backlight brightness adjustment (1/2)"""

This reverts commit 5a84c0e081c5dda9cb82817bd2d821a1d1df60da.