Bug 213680 [2.2.2]Chart script can not be cleaned completely.
Description: Reset script or delete all script does not work. build version: v20071221-0630 steps to reproduce: 1. New a report. 2. New a chart. 3. Enter some script for the chart and save the report. 4. Click the reset scirpt button or delete all script. 5. Save the report and switch to layout,then switch back to script page. Expected result: Script are cleaned. Actual result: Script are not cleaned. Note: If you delete part of the script, it works.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/PropertyCommand.java
ContentElementCommand attrCmd = new ContentElementCommand(
						module, element, ( (ContentElement) element )
								.getValueContainer( ) );
				attrCmd.doSetProperty( prop, value );
				return;
			}
		}
		doSetProperty( prop, value );
	}
	/**
	 * 
	 * @param prop
	 * @param value
	 * @throws SemanticException
	 */
	private void setElementTypeProperty( ElementPropertyDefn prop, Object value )
			throws SemanticException
	{
		ContainerContext context = new ContainerContext( element, prop
				.getName( ) );
		CommandStack stack = getActivityStack( );
		PropertyRecord record = new PropertyRecord( element, prop, value );
		stack.startTrans( record.getLabel( ) );
		ContentCommand cmd = new ContentCommand( module, context );
		List contents = context.getContents( module );
		try
		{
			
			if ( contents != null )
			{