[gnome-control-center] (7 commits) Non-fast-forward update to branch wip/hadess/add-windowing-system

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

The branch 'wip/hadess/add-windowing-system' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  e7b645e... info: Add windowing system field

Commits added to the branch:

  2c8cce0... search: Factor out creation of `Place` objects. (*)
  b5ff6d1... cc-search-locations: Use `g_new0` instead of the slice allo (*)
  d61d13d... network: Hide edit connection buttons if nm-connection-edit (*)
  4376140... common: Make the privileged group configurable (i.e. wheel  (*)
  3a1d629... power: Stop the brightness slider from jumping (*)
  dba1e59... Update Persian translation (*)
  e121dbc... info: Add windowing system field

(*) This commit already existed in another branch; no separate mail sent