This was breaking the templates test.
GtkWidget *button, *parent;
button = gtk_dialog_get_widget_for_response (GTK_DIALOG (object), GTK_RESPONSE_APPLY);
g_object_ref (button);
- parent = gtk_widget_get_parent (button);
- gtk_container_remove (GTK_CONTAINER (parent), button);
+ parent = gtk_widget_get_ancestor (button, GTK_TYPE_HEADER_BAR);
+ gtk_container_remove (GTK_CONTAINER (gtk_widget_get_parent (button)), button);
gtk_header_bar_pack_end (GTK_HEADER_BAR (parent), button);
g_object_unref (button);
}