private void appendDeleteButton(final Row row) {
Button delete = new Button("", "/common/img/ico_borrar1.png");
delete.setHoverImage("/common/img/ico_borrar.png");
delete.setSclass("icono");
delete.setTooltiptext(_("Delete"));
delete.addEventListener(Events.ON_CLICK, new EventListener() {
@Override
public void onEvent(Event event) {
confirmRemove((ExpenseSheetLine) row.getValue());
}
});