- Update to version 4.18.4
* Update copyright year
* power: Fix overall charge state calculation
* systray-icon: Handle scroll events
* Only show desktop files in Xfce
* main: Add missing newline in version info
* Remove outdated references to xfce-goodies
* pm-helper: Add missing GError initialization
* settings: Fix debug log
* settings: Fix inconsistent ref values between ui and gobject
* Fix initial state of "Handle brightness keys" switch in settings UI
* Ungrab brightness keys when not handling them
* Revert "Fix system-sleep-inactivity min value"
* Fix system-sleep-inactivity min value
* Translation Updates