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
Add new class PpAuthenticationDialog which shows dialog
requesting username and password. The dialog has 3 parameters.
The first one is a text which will be shown to the user and
the second is username by which username entry will be prefilled.
The last parameter is parent window so thedialog is properly
decorated and positioned.
https://bugzilla.gnome.org/show_bug.cgi?id=683229
