}
private List<IGridColumn> newColumns() {
List<IGridColumn> columns = new ArrayList<IGridColumn>();
final ReferenceEditorConfiguration conf = new ReferenceEditorConfiguration();
ManageMenuPanel panel = findParent(ManageMenuPanel.class);
conf.setWorkspaceName(panel.getModelObject().getId());
columns.add(new SubmitCancelColumn("submitCancel1", new ResourceModel("edit")));
columns.add(new EditablePropertyTreeColumn(new ResourceModel("title"), "entry.title") {
@Override
protected boolean isClickToEdit() {