prefs-dialog: Make it a HdyPreferencesWindow

3 jobs for wip/aplazas/preferences-window in 6 minutes and 14 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #305103
flatpak

00:05:09

 
  Deploy
passed #305104
review

00:01:04

manual #305105
allowed to fail manual
stop_review