[libadwaita] (6 commits) Non-fast-forward update to branch wip/exalm/fixes

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/fixes' 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:

  319aa13... clamp: Fix measuring child with for_size == -1
  2e4000c... focus: Rename to widget-utils
  eb0251d... Implement compute_expand() for widgets that have children
  4994f4e... header-bar: Remove a useless function
  7cfc783... Implement get_request_mode() where appropriate

Commits added to the branch:

  3e9ae3f... preferences-group: Use the markup for labels (*)
  edd1d99... clamp: Fix measuring child with for_size == -1
  f1cb986... focus: Rename to widget-utils
  f7a577c... Implement compute_expand() for widgets that have children
  0302f92... header-bar: Remove a useless function
  6b7d234... Implement get_request_mode() where appropriate

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