[gtk] (11 commits) Non-fast-forward update to branch wip/baedert/for-master

[Timm Bäder <baedert src gnome org>]

The branch 'wip/baedert/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:

  4a41a5c... applicationwindow: Stop querying shadow width
  0429084... window: Remove private _get_shadow_width()
  9f36014... applicationwindow: Simplify measure implementation
  aa48aa9... gl renderer: Cache whether clips is rectilinear
  d2d8b89... gl renderer: Refactor render_clipped_child
  c03270b... gl renderer: Improve clipping code

Commits added to the branch:

  3e68c69... Update Turkish translation (*)
  0606dd5... Update Romanian translation (*)
  f1e3581... Update Romanian translation (*)
  be8fc8f... Update Polish translation (*)
  2e27a76... applicationwindow: Stop querying shadow width
  48c9c86... window: Remove private _get_shadow_width()
  6090248... applicationwindow: Simplify measure implementation
  23e68c0... gl renderer: Cache whether clips is rectilinear
  094788f... gl renderer: Refactor render_clipped_child
  d5bf3c2... gl renderer: Improve clipping code
  04b7dd8... compare-render: Fix some memory leaks

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