[libadwaita] (18 commits) Non-fast-forward update to branch wip/exalm/tab-hover

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/tab-hover' 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:

  294574e... tab: Remove hover state handling
  8d16a86... tab: Show close button on enter as well
  d9208f2... tab-box: Handle middle click on release instead of press

Commits added to the branch:

  1933848... stylesheet: Fix treeview and columnview header borders (*)
  fd1eb99... stylesheet: Refresh treeview/columnview colors (*)
  fdef481... Update to meson >= 0.59.0 (*)
  6369084... Add Meson dependency override (*)
  847fac2... Remove usage of meson.source/build_root() (*)
  a365f09... Remove usage of gui_app in executable (*)
  543aae4... Remove manual application of -fvisibility=hidden (*)
  a04f0a1... Use library() instead of shared_library() (*)
  970d6ed... doc: Mention icon changes in the migration guide (*)
  92d8a81... _sidebars.scss: Remove backround from .view w/ navigation-s (*)
  a4bf044... avatar: Make custom images fill the circle (*)
  1772651... _lists.scss: Remove listview.content (*)
  80445e1... stylesheet: Add .boxed-list and swap uses of .content (*)
  e7c7ae5... doc: Mention that .content and .boxed-list are unsupported  (*)
  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

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