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
import org.eclipse.birt.report.model.api.DataSetHandle;
import org.eclipse.birt.report.model.api.DesignElementHandle;
import org.eclipse.birt.report.model.api.GroupHandle;
import org.eclipse.birt.report.model.api.ReportElementHandle;
import org.eclipse.birt.report.model.api.ReportItemHandle;
import org.eclipse.birt.report.model.api.ResultSetColumnHandle;
import org.eclipse.birt.report.model.api.StructureFactory;
import org.eclipse.birt.report.model.api.activity.NotificationEvent;
import org.eclipse.birt.report.model.api.activity.SemanticException;
import org.eclipse.birt.report.model.api.command.PropertyEvent;
import org.eclipse.birt.report.model.api.elements.structures.ComputedColumn;
import org.eclipse.birt.report.model.api.metadata.IChoice;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.swt.widgets.Table;
/**
 * 
 */
public class DataSetColumnBindingsFormHandleProvider extends
		AbstractFormHandleProvider
{
	private static final String ALL = Messages.getString( "DataSetColumnBindingsFormHandleProvider.ALL" );
	private static final String NONE = Messages.getString( "DataSetColumnBindingsFormHandleProvider.NONE" );
	private boolean showAggregation = false;
	private String[] columnNames = new String[]{
			Messages.getString( "DataSetColumnBindingsFormHandleProvider.Column.Name" ),
			Messages.getString( "DataSetColumnBindingsFormHandleProvider.Column.DataType" ),
			Messages.getString( "DataSetColumnBindingsFormHandleProvider.Column.Expression" ),