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

[Alexander Mikhaylenko <alexm src gnome org>]

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

  059f99f... version: Add 1.3 version macros
  86ccb8c... demo: Update tab indicator icons
  204b55d... icons: Update default tab icon
  604c718... tab-view: Rename notify_pages in detach_page() to in_dispos
  90a5554... tab-view: Port away from GtkStack
  4a4b6cd... Add AdwTabButton
  ec1eb68... Add AdwTabOverview
  fa6fa9f... demo: Swap new tab and new window buttons in tabs demo
  7e47dbb... demo: Hide tab bar when the tab window is narrow
  2064849... demo: Set minimum width for the tab view demo
  863aeef... demo: Extract tab view pages into a separate class
  95fa6bb... demo: Add colored backgrounds to tab pages
  fd137b2... demo: Use AdwTabOverview in the tabs demo

Commits added to the branch:

  ecaa3a7... Update Slovenian translation (*)
  ff159b6... Update Bulgarian translation (*)
  a905117... Release 1.2.0 (*)
  79f76a6... Post-release version bump to 1.3.alpha (*)
  c168d47... stylesheet: Fix spinbuttons inside toolbars (*)
  48c62e4... version: Add 1.3 version macros
  6920951... demo: Update tab indicator icons
  61af3b7... icons: Update default tab icon
  1a614fc... tab-view: Rename notify_pages in detach_page() to in_dispos
  3db81a0... tab-view: Port away from GtkStack
  792afd2... Add AdwTabButton
  04a4816... Add AdwTabOverview
  7789076... demo: Swap new tab and new window buttons in tabs demo
  35f55d0... demo: Hide tab bar when the tab window is narrow
  17b19e8... demo: Set minimum width for the tab view demo
  de93fbf... demo: Extract tab view pages into a separate class
  0442235... demo: Add colored backgrounds to tab pages
  45f2557... demo: Use AdwTabOverview in the tabs demo

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