gtk_window_set_transient_for(GTK_WINDOW(fvd->f_window),
GTK_WINDOW(main_window_get_widget(tab)));
gtk_window_set_destroy_with_parent(GTK_WINDOW(fvd->f_window), TRUE);
gtk_window_set_transient_for(GTK_WINDOW(fvd->f_window),
GTK_WINDOW(main_window_get_widget(tab)));
gtk_window_set_destroy_with_parent(GTK_WINDOW(fvd->f_window), TRUE);