[libadwaita] (32 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:

  e289971... tab: Remove hover state handling
  9f50d74... tab: Show close button on enter as well
  85e49e8... tab-box: Handle middle click on release instead of press

Commits added to the branch:

  d090ad0... Revert "stylesheet: Remove .sidebar border" (*)
  a63b67a... Revert "demo: Stop overriding sidebar styles" (*)
  1b15fc1... stylesheet: Make .navigation-sidebar remove background (*)
  e57a73d... stylesheet: Deprecate .sidebar (*)
  2177659... demo: Remove the deprecated .sidebar class (*)
  63466cb... stylesheet: Extract $disabled_opacity (*)
  29227aa... stylesheet: Override disabled opacity in HC (*)
  deabc18... stylesheet: Consistently use dim label oapcity (*)
  fc73179... stylesheet: Fix menu radios in HC (*)
  1e78289... stylesheet: Fix warning/error entry focus ring in HC (*)
  b188f5b... stylesheet: Fix double opacity on spinbutton buttons (*)
  bd9b06f... stylesheet: Fix notebook disabled state (*)
  81f71fc... stylesheet: Use smaller opacity for disabled flat buttons (*)
  18c80b5... stylesheet: Fix scale slider disabled state (*)
  491ab4c... stylesheet: Add a .card style class (*)
  599eed2... stylesheet: Add button.opaque style class (*)
  f5e0750... stylesheet: Consistently support colored styles between but (*)
  4304435... stylesheet: Support .pill for menu buttons (*)
  5ebabe5... stylesheet: Stop supporting .flat+suggested/destructive-act (*)
  1463d4d... stylesheet: More thorough entry.error and .warning styles (*)
  b38380d... stylesheet: Fix flat/outline buttons in toolbar popovers (*)
  8281a46... stylesheet: Remove overlay osd overrides for toolbars (*)
  6220614... stylesheet: Normalize padding for osd toolbars (*)
  5af9db4... stylesheet: Adjust margins for scalebuttons in toolbars (*)
  689b585... stylesheet: Fix a typo in button.osd:checked style (*)
  1f285d9... stylesheet: Allow .card on buttons as well (*)
  e49a407... demo: Add a style classes demo page (*)
  62f57c8... stylesheet: Support split buttons in HC (*)
  0860fa9... demo: Vexpand carousel children (*)
  7dbc5ff... tab: Remove hover state handling
  0858bc5... tab: Show close button on enter as well
  1daa610... tab-box: Handle middle click on release instead of press

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