[libadwaita] (40 commits) Non-fast-forward update to branch wip/exalm/borders

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/borders' 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:

  32a754d... stylesheet: Drop an unused variable
  ed05667... stylesheet: Remove alt border color
  84ea747... stylesheet: Stop using $borders_color for overshoot
  f4888ea... stylesheet: Replace solid-csd border with an inset shadow
  c97b957... a
  2a1b259... stylesheet: Make sure header bar borders have contrast
  af2a514... Padding fixes

Commits added to the branch:

  1d5340b... avatar: Fix memory leaks (*)
  2c81acd... demo-window: Fix a memory leak (*)
  8555174... stylesheet: Fix slider for scale.marks-before.marks-after (*)
  d67535c... tests: add test for model correctness (*)
  f6302c0... tab-view: delay notify::selected-page until after setting (*)
  4c8d07b... doc: Add the alpha to alpha migration guide (*)
  f5932ab... Release 1.0.0-alpha.2 (*)
  a236e25... avatar: Use auto cleanups for Cairo types (*)
  c858375... icons: Update adw-expander-arrow-symbolic (*)
  959f434... demo: Update icons (*)
  8eae01f... squeezer: Reduce the scope of some variables (*)
  7265a43... squeezer: Typo fix (*)
  d459e69... squeezer: Add the allow-none property (*)
  1ee626b... demo: Quick hack to show how it works (*)
  8c79ff3... Revert "demo: Quick hack to show how it works" (*)
  11effb6... squeezer: Fix tests (*)
  e37f685... action-row: Remove typo (*)
  51563f1... action-row: Remove unnecessary unparent (*)
  7bf2290... Use non-deprecated license identifier (*)
  80a908b... meson: Use correct SPDX identifier (*)
  bb657d8... stylesheet: Drop an unused variable
  4f63b27... stylesheet: Remove alt border color
  5035066... stylesheet: Stop using $borders_color for overshoot
  1f13876... stylesheet: Replace solid-csd border with an inset shadow
  05c180a... stylesheet: Stop using $dark_fill for notebook hover
  7362e3e... stylesheet: Make dark_fill not depend on border color
  8094893... stylesheet: Remove insensitive_borders_color
  a93e1c5... stylesheet: Increase opacity on HC trough colors
  3fe0d30... stylesheet: Remove $treeview_borders_color
  c0ed244... stylesheet: Use regular $borders_color for separators
  e9146ab... stylesheet: Fix legacy file chooser dialog border
  4646b08... stylesheet: Simplify entry border
  7947946... stylesheet: Use regular $borders_color for lists
  8db67cf... stylesheet: Remove a few redundant &s
  dd5f178... stylesheet: Stop using $borders_color for HC switches
  9ec3854... stylesheet: Replace scrollbar border with an inset box-shad
  5225f5d... stylesheet: Use box-shadow instead of border for toolbars
  8bdb26e... stylesheet: Overhaul header bar and tab bar borders
  43d1689... stylesheet: Add background-clip: padding-box where we use b
  1463f38... stylesheet: Use recolorable half-transparent borders

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