[gtk] (2 commits) ...Merge branch 'gtk-4-file-containers-in-sidebar' into 'master'

From: Matthias Clasen <matthiasc src gnome org>
To: commits-list gnome org
Cc:
Subject: [gtk] (2 commits) ...Merge branch 'gtk-4-file-containers-in-sidebar' into 'master'
Date: Fri, 5 Apr 2019 19:59:12 +0000 (UTC)

Summary of changes:

  d465523... gtkplacessidebar: Add loop devices
  11428fb... Merge branch 'gtk-4-file-containers-in-sidebar' into 'maste