[libadwaita] (5 commits) Non-fast-forward update to branch wip/exalm/tabs2

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/tabs2' 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:

  bba30d3... tab-box: Make set_adjustment() private
  546a8bd... tab: Remove nonexistent functions from header

Commits added to the branch:

  d0a7643... stylesheet: Fix AdwSplitButton disabled state (*)
  7af874e... squeezer: Remove duplicate code in size_allocate() (*)
  3c4537b... Update Catalan translation (*)
  1a468b1... tab-box: Make set_adjustment() private
  ef1a669... tab: Remove nonexistent functions from header

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