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

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/headerbar-icon' 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:

  3eeee49... stylesheet: Style GtkWindowControls icon properly

Commits added to the branch:

  675ff12... demo: Fix a g_autofree warning in CI (*)
  d79d11f... tab: Remove hover state handling (*)
  a7122bb... tab: Show close button on enter as well (*)
  4e2ef2f... tab-box: Handle middle click on release instead of press (*)
  29e1b59... stylesheet: Style GtkWindowControls icon properly

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