[libadwaita] (19 commits) Created branch wip/exalm/menu-split-buttons

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/menu-split-buttons' was created.

Summary of new commits:

  99b6f5c... squeezer: Fix the threshold policy doc links
  f9815e6... Added Lithuanian translation
  b499519... Czech translation
  2090c1f... Add Galician translation
  7a01878... stylesheet: Update menu button style
  917eb8b... Add AdwSplitButton
  6d2621f... Add AdwButtonContent
  fd2b023... stylesheet: Remove separator margin for non-menu popovers
  4dbebe2... stylesheet: Extract style for raised buttons
  aa3aaa1... stylesheet: Use toolbar style for header bars and action ba
  7a9468b... stylesheet: Reset toolbar styles for popovers
  3504fca... stylesheet: Make GtkWindowControls buttons filled
  b2920f2... stylesheet: Make image buttons square
  d1b656b... stylesheet: Specificity bump for spinbutton buttons
  1cc6f6e... view-switcher-button: Set spacing in css and match buttons
  80747cb... stylesheet: Add separator.spacer
  3674f11... doc: Mention the flat button changes in the migration guide
  34fef00... example: Add a split button+button content page
  2024212... stylesheet: Make any arrow buttons and split buttons flat a