Power manager handles brightness keys when disabled in settings
On the live CD of Xubuntu 21.04 and OpenSUSE Tumbleweed both running Xfce 4.16, I noticed that though 'Handle display brightness keys' is disabled, the 'Brightness step count' spinbox and exponential checkbox are enabled and it is handling the brightness keys. If I enable 'Handle display brightness keys' and then disable it, the spinbox and checkbox are disabled and then the keys are no longer handled.