gnome-control-center UI freeze break request

[Marek Kasik <mkasik redhat com>]

Bug 693183 - GNOME Printer Setup Tool: List of discovered printers
should better describe duplicate entries
 - https://bugzilla.gnome.org/show_bug.cgi?id=693183

I want to push a change which will better describe found print devices
in the new printer dialog.

There are 2 UI changes and 6 new strings.

The first change is a fix of a long standing bug when a selected printer
had its location shown in gray color. It uses default colors for
selected text with the patch.

The second change adds description of connection type of found printers.
It shows "USB", "Bluetooth", "Serial Port" or "Parallel Port" for local
printers below the names of found devices and "Address: %s" or
"Location: %s" for network printers.

You can see a screenshot of the changes here:
https://bug693183.bugzilla-attachments.gnome.org/attachment.cgi?id=270117 .

The changes were reviewed by Bastien and Allan.

Regards

Marek