Support PARTUUID fstab entries in mount options dialog
@kailueke
Submitted by Kai Lüke Link to original bug (#794104)
Description
If the fstab entry for a filesystem uses the PARTUUID as reference, the GNOME Disks mount options dialog will fallback to e.g. /dev/sda1 because currently PARTUUID is not a recognized key.
Also, changing the identifier should not overwrite the mount point entry if already present.
Version: 3.27.x