Bug 131089 Allow for Multi-select combo and list boxes
Please develop the capability allow for mutli-select (i.e. control-click) combo-box and listboxes.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/data/ui/util/SelectValueFetcher.java
/**
	 * private constructor
	 */
	private SelectValueFetcher( )
	{
	}
	
	/**
	 * 
	 * @param selectValueExpression
	 * @param dataSetHandle
	 * @return
	 * @throws BirtException
	 */
	public static List getSelectValueList( String expression,
			DataSetHandle dataSetHandle ) throws BirtException
	{
		List selectValueList = new ArrayList( );
		if ( expression != null && expression.trim( ).length( ) > 0 )
		{
			
			QueryDefinition query = new QueryDefinition( );
			query.setDataSetName( dataSetHandle.getQualifiedName( ) );
			PropertyHandle handle = dataSetHandle.getPropertyHandle( DataSetHandle.PARAMETERS_PROP );
			if ( handle != null )
			{
				Iterator paramIter = handle.iterator( );
				while ( paramIter.hasNext( ) )
				{