[libgd] (10 commits) Non-fast-forward update to branch wip/ernestask/gtk4

[Ernestas Kulik <ernestask src gnome org>]

The branch 'wip/ernestask/gtk4' 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:

  f03e7ee... Add test for GdNotification
  38cc7a2... notification: use g_timeout_add()
  b121c37... notification: remove include_internals from forall()
  3b79808... notification: remove draw vfunc override
  383ad77... notification: use gtk_widget_measure()
  2d11011... notification: override generic event vfunc
  d2ea3fc... notification: remove visibility_notify_event override
  407f426... notification: use gtk_widget_get_allocated_height()
  3c0f136... notification: default to being invisible
  c89d615... notification: use specialized GdkWindow constructors
  d34c776... toggle-pixbuf-renderer: copy gtk_paint_spinner() from GTK+

Commits added to the branch:

  7bfbc0d... Add test for GdNotification
  4541638... notification: use g_timeout_add()
  a74b327... notification: remove include_internals from forall()
  ec8bc73... notification: remove draw vfunc override
  c3c918d... notification: use gtk_widget_measure()
  b2e0141... notification: use an event controller for motion events
  cd5719a... notification: remove visibility_notify_event override
  dc29de4... notification: use gtk_widget_get_allocated_height()
  aca9c1c... notification: default to being invisible
  04e11ca... toggle-pixbuf-renderer: copy gtk_paint_spinner() from GTK+