Bug 190207 Integrate Aggregation builder with charts
Charts should be able to use aggregates in their databinding definition. The UI is missing the "Add Aggregation..." button in the chart databinding dialog.
UI/org.eclipse.birt.report.designer.ui.views/src/org/eclipse/birt/report/designer/internal/ui/views/attributes/provider/DataSetColumnBindingsFormHandleProvider.java
dialog.setInput( (ReportItemHandle) bindingObject, bindingHandle );
		if ( dialog.open( ) == Dialog.OK )
		{
			if ( isResultSetColumn )
			{
				try
				{
					( (DataItemHandle) bindingObject ).setResultSetColumn( bindingHandle.getName( ) );
				}
				catch ( Exception e )
				{
					ExceptionHandler.handle( e );
				}
			}
			if ( viewer != null )
			{
				viewer.refresh( true );
				return true;
			}
			/*
			 * if ( bindingObject instanceof ReportItemHandle ) { if ( viewer !=
			 * null ) viewer.editElement( viewer.getElementAt( pos ), 0 );
			 * return true; } if ( bindingObject instanceof GroupHandle ) { if (
			 * viewer != null ) viewer.editElement( viewer.getElementAt( pos ),
			 * 0 ); return true; }
			 */
		}
		return false;
	}
	public String getColumnText( Object element, int columnIndex )