Bug 198270 Copying an aggregate does not make a copy, only a reference
In a table with groups or multiple columns, create an aggregate in a footer or a header. Copy the aggregate to another cell in a footer or a header. Make changes to the new aggregate appropriate to its new location. Expected result: The changes appear in only the new copy of the aggregate. Actual result: The changes appear in both aggregates because the new aggregate is not a copy, but a reference to the same aggregate as the original.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/DataColumnBindingDialog.java
{
	protected static final String DEFAULT_ITEM_NAME = "data column"; 
	protected static final String NEW_DATAITEM_TITLE = Messages.getString( "DataColumBindingDialog.title.CreateNewDataBinding" ); 
	protected static final String EDIT_DATAITEM_TITLE = Messages.getString( "DataColumBindingDialog.title.EditDataBinding" ); 
	
	protected static final String AGG_BUILDER_TITLE = Messages.getString( "DataColumBindingDialog.title.AggBuilder" ); 
	IBindingDialogHelper dialogHelper;
	private ReportItemHandle bindingObject;
	private ComputedColumnHandle bindingColumn;
	private ExpressionProvider expressionProvider;
	private boolean isAggregate;
	public DataColumnBindingDialog( boolean isCreateNew )
	{
		super( isCreateNew == true ? NEW_DATAITEM_TITLE : EDIT_DATAITEM_TITLE );
	}
	public void setInput( ReportItemHandle input )
	{
		setInput( input, null );
	}
	public DesignElementHandle getBindingObject( )
	{