Revert "mako LCD: keep RGB custom colors alive after screen off/on"

This reverts commit 1e55a08cc58718d8d6e2b3e2b6d46a5421beef23.
Revert "Mako Gamma Control"

This reverts commit 404d5d6aecdfaa38e1b72f0964fcec1f9aec9e75.