[gtk] (18 commits) Non-fast-forward update to branch ebassi/for-master

[Emmanuele Bassi <ebassi src gnome org>]

The branch 'ebassi/for-master' 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:

  59c99df... a11y: Turn critical warnings into debug messages
  d5860c3... a11y: Cache the accessibility bus address

Commits added to the branch:

  4660132... properly set ScaleButton's parent_class (*)
  47d5728... Merge branch 'scalebutton' into 'master' (*)
  8e81cbe... stacksidebar: Add missing .navigation-sidebar to the inner  (*)
  40f2b49... Adwaita: Make treeexpander styling generic (*)
  9828756... Adwaita: Move placessidebar-specific sizing from .navigatio (*)
  179fc68... Adwaita: Fix some sidebar sizing (*)
  bd0d75e... Adwaita: Make sidebar row styling better (*)
  61dcb68... Adwaita: Unify sidebar background-color (*)
  56eac4f... gtk-demo: Add .sidebar style class in the main window (*)
  3e996f6... icon-browser: Add .sidebar style class in the main window (*)
  3a1b208... Do not depend on GLib API introduced after 2.66 (*)
  de7833b... Use the right GLib macros for version checking (*)
  505478b... Drop GLib dependency from GTK's declared dependencies (*)
  1f44319... Drop redundant dependencies (*)
  803b147... Disable deprecation warnings from GLib (*)
  fd3a629... Merge branch 'ebassi/glib-min-version' into 'master' (*)
  0a46bae... a11y: Turn critical warnings into debug messages
  ef86e46... a11y: Cache the accessibility bus address

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