add_subwindow(filter_text = new BC_FileBoxFilterText(x1, y, this));
add_subwindow(filter_popup =
new BC_FileBoxFilterMenu(x1 + filter_text->get_w(), y, this));
add_subwindow(filter_text = new BC_FileBoxFilterText(x1, y, this));
add_subwindow(filter_popup =
new BC_FileBoxFilterMenu(x1 + filter_text->get_w(), y, this));