[libadwaita] (7 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:

  98462d2... Add AdwTabOverview
  f9f8b7a... demo: Swap new tab and new window buttons in tabs demo
  84d06ef... demo: Hide tab bar when the tab window is narrow
  b272aff... demo: Set minimum width for the tab view demo
  a092364... demo: Extract tab view pages into a separate class
  cb5eea2... demo: Add colored backgrounds to tab pages
  d5a17ef... demo: Use AdwTabOverview in the tabs demo

Commits added to the branch:

  dfeb17f... Add AdwTabOverview
  cdb09d3... demo: Swap new tab and new window buttons in tabs demo
  83cb9a5... demo: Hide tab bar when the tab window is narrow
  39511e2... demo: Set minimum width for the tab view demo
  08d8af4... demo: Extract tab view pages into a separate class
  647ef4d... demo: Add colored backgrounds to tab pages
  b359a64... demo: Use AdwTabOverview in the tabs demo