[libadwaita] (15 commits) Non-fast-forward update to branch wip/exalm/needs-attention

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/needs-attention' 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:

  f5af6c9... example: Update view switcher demo icons
  ee25f45... Add AdwIndicatorBin
  80650cf... view-switcher: Don't set needs-attention class on buttons
  170540e... view-switcher-button: Reimplement indicator as a widget

Commits added to the branch:

  7ca8e64... preferences-window: Use gtk_widget_get_ancestor() (*)
  364afff... preferences-window: Fix a build warning (*)
  785618d... preferences-window: Refactor new_search_row_for_preference( (*)
  2e9ab64... preferences-window: Get the number of pages manually (*)
  10362d4... preferences-window: Bind search model lazily (*)
  2557884... preferences-window: Fix search filter visible property (*)
  594eb98... Add Dutch translation (*)
  6e96ffc... examples: Bundle sassc in flatpak manifest (*)
  79474ee... Add sassc and libsass subprojects (*)
  616731f... Import Adwaita stylesheet (*)
  2625b9b... meson: Fix gresources indentation (*)
  b521abc... example: Update view switcher demo icons
  3c89bc8... Add AdwIndicatorBin
  6e1744f... view-switcher: Don't set needs-attention class on buttons
  9fc6e7e... view-switcher-button: Reimplement indicator as a widget

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