[libadwaita] (8 commits) Non-fast-forward update to branch wip/exalm/treeview-fix

[Adrien Plazas <aplazas src gnome org>]

The branch 'wip/exalm/treeview-fix' 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:

  3f1a68f... stylesheet: Fix treeview accel editor color

Commits added to the branch:

  732f636... doc: Fix the license (*)
  0509755... action-row: Fix the parent class type (*)
  218f671... stylesheet: Fix menu check/radio/arrow states (*)
  2528113... stylesheet: Simplify checks and radios (*)
  ce1b515... stylesheet: Update levelbar style (*)
  37bc985... stylesheet: Add a disabled state for levelbars (*)
  8e0633b... stylesheet: Fix vertical levelbar bugs (*)
  5592de1... stylesheet: Fix treeview accel editor color

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