This dialog handles the editing of printer properties such as
name, location, automatic discovery of driver, manual selection
of printer driver, and manual selection of ppd file.
https://bugzilla.gnome.org/show_bug.cgi?id=767600
This commit introduces the following regressions:
- no possibility of renaming properties such as printer names,
location, or changing model/driver. This issue is going to be
solved nextly by the introduction of the PpDetailsDialog.
https://bugzilla.gnome.org/show_bug.cgi?id=767600