[gtk] (5 commits) Non-fast-forward update to branch wip/baedert/for-master

[Timm Bäder <baedert src gnome org>]

The branch 'wip/baedert/for-master' 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:

  4ffd6b3... Start using GtkWidget's new style class API
  dde16bc... snapshot: Add _push_collect() and _pop_collect()
  1c27c51... widget: Use gtk_snapshot_{push,pop})_collect
  2e0b4e8... widget: Fix a from_string/try_string mixup
  5b2bc8c... GskRoundedRect: Inline graphene_rect_contains_rect

Commits added to the branch:

  c4585ec... Start using GtkWidget's new style class API
  447f229... snapshot: Add _push_collect() and _pop_collect()
  54fad68... widget: Use gtk_snapshot_{push,pop})_collect
  673c1f5... widget: Fix a from_string/try_string mixup
  5cea02c... GskRoundedRect: Inline graphene_rect_contains_rect