Ahh excellent news. So indeed the new kernel sees the device USB policy will be improved in the future so it's kept after updates, so doing it once will be enough.
Thanks for testing!
@acebmxer
I need to check, I think my from sources is also doing this, light/dark stays but I need to check themes and see. That said I am probably 3 dozen commits behind at this point and probably going to wait until next week to update any of my XO from sources (yes two, one VM and one on bare metal Debian as a backup).