Bug 121352 The data set binding property cannot be retrieved in report preview layout
In report preview page, the datasource/dataset property binding lists cannot be retrieved. The dataset binding can not work correctly in layout preview because it's value cannot get from the binding list. But in the data set edit page, the binding value can be got. You can refer to the attachment.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
* @return Object the cloned design element.
	 * @throws CloneNotSupportedException
	 *             if clone is not supported.
	 * 
	 */
	public Object clone( ) throws CloneNotSupportedException
	{
		DesignElement element = (DesignElement) super.clone( );
		element.container = null;
		element.listeners = null;
		element.derived = null;
		element.extendsRef = null;
		element.cachedDefn = null;
		element.handle = null;
		element.id = 0;
		element.baseId = NO_BASE_ID;
		element.propValues = new HashMap( );
		DesignElement current = this;
		Iterator iter = null;
		while ( current != null )
		{
			iter = current.propValues.keySet( ).iterator( );
			while ( iter.hasNext( ) )
			{
				String key = (String) iter.next( );
				if ( element.propValues.get( key ) != null )
					continue;
				PropertyDefn propDefn = getPropertyDefn( key );
				Object value = current.propValues.get( key );
				element.propValues.put( key, ModelUtil.copyValue( propDefn,