gtk_box_pack_start (GTK_BOX (content_area), vbox, TRUE, TRUE, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 5);
/* Sensitive */
gtk_box_pack_start (GTK_BOX (content_area), vbox, TRUE, TRUE, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 5);
/* Sensitive */