_assignDefaultManagerColumn = new TableColumn(_tblACLRoles, SWT.NONE);
_assignDefaultManagerColumn.setText("Assign to default manager");
_assignDefaultManagerColumn.setWidth((int)(tableWidth * 0.5));
_aclRolesModel = new ACLRolesModel(_model.getACLRoles());
_aclRolesModel.addListener(new BeanListTableModelListener() {
public void add(Object bean) {
_model.fireModelChanged();
}