[gtk+] (6 commits) Non-fast-forward update to branch wip/matthiasc/icon-texture-cache

[Matthias Clasen <matthiasc src gnome org>]

The branch 'wip/matthiasc/icon-texture-cache' 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:

  2494e27... icon theme: Add a texture cache
  e5813b3... icon helper: Use cached textures

Commits added to the branch:

  f59e5b2... adwaita: Remove focus outlines from textviews (*)
  9f1716e... testsuite: Disable vulkan tests when vulkan isn't available (*)
  6c7d9c6... recent manager: Remove dead code (*)
  02db8cc... icon theme: Add a texture cache
  b543257... icon helper: Use cached textures
  1dc1da9... wip: use a color matrix for symbolic icons

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