GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (vs));
vs->val_labs_dialog = val_labs_dialog_create (GTK_WINDOW (toplevel),
GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (vs));
vs->val_labs_dialog = val_labs_dialog_create (GTK_WINDOW (toplevel),