[gtk+] (26 commits) Non-fast-forward update to branch wip/matthiasc/fancy-overlay

[Matthias Clasen <matthiasc src gnome org>]

The branch 'wip/matthiasc/fancy-overlay' 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:

  790880c... Add an effect child property to GtkOverlay
  21c88fd... Add a test for effects
  a4071fd... Correct a comment
  6076bd2... Make the example slighly more fancy
  d868d34... gsk: Add a blur node
  6742cb1... Add gtk_snapshot_push_blur()
  5c88157... overlay: Change the effect to a blur
  5184fb9... css: Implement the blur filter
  8ebd3e0... Handle effect on multiple children
  85ea204... Add a second button to the test

Commits added to the branch:

  1346520... Update Brazilian Portuguese translation (*)
  98281bc... testcenterbox: Properly quit on window close (*)
  7481aff... container: Drop priv pointer (*)
  7ed0d93... ToolItem: Annotate menu proxy item as nullable (*)
  5095ca6... ToolItem: Add see-also from proxy setter to signal (*)
  1b38944... Toolbar: Clarify how the arrow overflow menu works (*)
  48055f9... Toolbar: Clarify set_show_arrow() a bit more (*)
  b5afe75... docs: css-overview: Don’t recommend broken syntax (*)
  8cd37ff... HighContrast: Fix outdated name for headerbar box (*)
  68631d6... Adwaita: Fix ineffective theming of switch slider (*)
  eab5024... Only record node names when we should (*)
  8db13c3... gsk: Improve debug output (*)
  a05895e... Record node names for debug output (*)
  2101f26... vulkan: Add more debug spew (*)
  7bb202e... Add a workaround for vulkan crashes (*)
  d3d10fa... Update Catalan translation (*)
  0fbd16b... Update Latvian translation (*)
  ccc587c... Updated Lithuanian translation (*)
  59b1206... Avoid empty nodes another way (*)
  d281cd7... Fix a compiler warning (*)
  86c0c24... Add rules to regenerate all shader variants (*)
  a9eb063... gsk: Add a blur node
  4b4fbf2... Add gtk_snapshot_push_blur()
  c9eb292... Add a blur child property to GtkOverlay
  ac6274a... Add a test for overlay blur
  ce7dd32... css: Implement the blur filter

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