Oooh! Oooh! gtk frontend!
Couple points, haven't looked at the code in detail:
* The .glade file needs an entry in
frontends/gtk/glade/Makefile.am to get installed.
* The .glade file should have the separator disabled on the dialog
object to be consistent with the others and GNOME standards, the
property's called "Hat Trennlinie" if you're running in de.John
