[Bug 54257] gnome-cups-maneger should show information on detected backends

[Michal Suchanek]

Public bug reported:

When a printer connected to a special backend is detected, the window
with the list of printers should display information on that backend.

ie when a printer using the hp backend is detected the window should
show a notice that this backend should be used rather than the usb/lpt
backends because it works with hplip

** Affects: gnome-cups-manager (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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gnome-cups-maneger should show information on detected backends
https://launchpad.net/bugs/54257