[gtk] (12 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:

  538b943... testblur: Fix default blur radius
  875d291... gl renderer: Blur shader improvements
  af32615... gl renderer: Add some often needed debug code
  d9bb761... gl renderer: Scale blur radius
  6d159ea... gl renderer: Take a TextureRegion in blur_texture
  de84eb6... gl renderer: Implement blurred shadow nodes
  8eb5e8b... snapshot: Factor out color matrix merging
  ec418eb... snapshot: Reorder color matrix nodes containing a transform
  b13ea40... window: Don't set invalid csd input shape

Commits added to the branch:

  be74be0... widget-factory: Fix a popover menu (*)
  e2fc09b... testblur: Fix default blur radius
  37e9053... gl renderer: Blur shader improvements
  8249ac6... gl renderer: Add some often needed debug code
  a5cab5c... gl renderer: Scale blur radius
  3cb61e3... gl renderer: Take a TextureRegion in blur_texture
  9a86394... gl renderer: Implement blurred shadow nodes
  26a8bbc... snapshot: Factor out color matrix merging
  3d0d942... snapshot: Reorder color matrix nodes containing a transform
  1c10f99... window: Don't set invalid csd input shape
  3a237cc... Revert "widget-factory: Fix a popover menu"
  0b2b8dc... gl renderer: Save one level of indentation

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