[libadwaita] (10 commits) Non-fast-forward update to branch wip/exalm/stylesheet

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/stylesheet' 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:

  150a986... examples: Bundle sassc in flatpak manifest
  5fc1f11... Add sassc and libsass subprojects
  fe89726... Import Adwaita stylesheet

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 (*)
  a03c4fc... examples: Bundle sassc in flatpak manifest
  b6e32ac... Add sassc and libsass subprojects
  4b92285... Import Adwaita stylesheet

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