Additional Printer Settings button requires system-config-printer

[Jeremy Bícha]

Impact
------
system-config-printer is only a Recommends. If it is uninstalled, then the Additional Printer Settings button in GNOME Settings > Printers doesn't work.

Test Case
---------
Install the updates.
It should now no longer be possible to uninstall system-config-printer without uninstalling gnome-control-center.

Regression Potential
--------------------
This doesn't really change the status quo for most people since system-config-printer was already part of the default install.

Other Info
----------
Eventually the Ubuntu Desktop team wants to remove the Additional Printer Settings we patch in, but there are still a few features that GNOME Settings doesn't have yet, like printer sharing.

[Launchpad Janitor (janitor)]

This bug was fixed in the package gnome-control-center - 1:3.28.1-0ubuntu2

---------------
gnome-control-center (1:3.28.1-0ubuntu2) cosmic; urgency=medium

  * Rename ubuntu-gnome-version.patch to distro-logo.patch for proposed
    upstreaming to Debian. Drop the hardcoded use of the Ubuntu font.
    (LP: #1770473)
  * debian/control.in:
    - Drop now unnecessary fonts-ubuntu dependency
    - Don't recommend libnss-myhostname since systemd-resolved handles this
      functionality (LP: #1766575)
    - Demote network-manager-gnome dependency back to recommends
      (LP: #1770673)
    - Depend on system-config-printer instead of system-config-printer-common
      for the Additional Printer Settings button (LP: #1770695)
  * Add 0007-fix-open-last-page.patch:
    - Proposed patch fixes the "open last opened page" feature for Devices and
      Details pages (LP: #1770699)

 -- Jeremy Bicha <email address hidden> Fri, 11 May 2018 12:59:17 -0400

[Sebastien Bacher (seb128)]

It's minor and doesn't need to be actively targetted and didn't move since mai, wontfixing for now for bionic but feel free to upload/change the status if you are still interested