Bug 155943 "Restore Properties" is always enabled for extended chart
Steps to reproduce: 1.New a report, includes a library, extends lib.chart 2.Choose the chart Expected result: "Restore Properties" is disabled untill set/change any local properties for the chart Actual result: "Restore Properties" is always enabled
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
boundColumnsMgr.dealScalarParameter( obj, getModule( ) );
		writer.startElement( DesignSchemaConstants.SCALAR_PARAMETER_TAG );
		super.visitScalarParameter( obj );
		property( obj, ScalarParameter.VALUE_TYPE_PROP );
		property( obj, ScalarParameter.DATA_TYPE_PROP );
		resourceKey( obj, ScalarParameter.PROMPT_TEXT_ID_PROP,
				ScalarParameter.PROMPT_TEXT_PROP );
		property( obj, ScalarParameter.LIST_LIMIT_PROP );
		property( obj, ScalarParameter.CONCEAL_VALUE_PROP );
		property( obj, ScalarParameter.ALLOW_BLANK_PROP );
		property( obj, ScalarParameter.ALLOW_NULL_PROP );
		property( obj, ScalarParameter.CONTROL_TYPE_PROP );
		property( obj, ScalarParameter.ALIGNMENT_PROP );
		property( obj, ScalarParameter.DATASET_NAME_PROP );
		property( obj, ScalarParameter.VALUE_EXPR_PROP );
		property( obj, ScalarParameter.LABEL_EXPR_PROP );
		property( obj, ScalarParameter.MUCH_MATCH_PROP );
		property( obj, ScalarParameter.FIXED_ORDER_PROP );
		property( obj, ScalarParameter.DEFAULT_VALUE_PROP );
		writeStructure( obj, ScalarParameter.FORMAT_PROP );
		writeStructureList( obj, ScalarParameter.SELECTION_LIST_PROP );
		writeStructureList( obj, ReportItem.BOUND_DATA_COLUMNS_PROP );
		writer.endElement( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.elements.ElementVisitor#visitTemplateDataSet(org.eclipse.birt.report.model.elements.TemplateDataSet)
	 */
	public void visitTemplateDataSet( TemplateDataSet obj )