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
* 
	 * @see org.eclipse.birt.report.model.design.elements.DesignVisitor#visitLine(org.eclipse.birt.report.model.design.elements.LineItem)
	 */
	public void visitLine( LineItem obj )
	{
		writer.startElement( DesignSchemaConstants.LINE_TAG );
		super.visitLine( obj );
		property( obj, LineItem.ORIENTATION_PROP );
		writer.endElement( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.design.elements.DesignVisitor#visitGraphicMasterPage(org.eclipse.birt.report.model.design.elements.GraphicMasterPage)
	 */
	public void visitGraphicMasterPage( GraphicMasterPage obj )
	{
		writer.startElement( DesignSchemaConstants.GRAPHIC_MASTER_PAGE_TAG );
		super.visitGraphicMasterPage( obj );
		property( obj, GraphicMasterPage.COLUMNS_PROP );
		property( obj, GraphicMasterPage.COLUMN_SPACING_PROP );
		writeContents( obj, GraphicMasterPage.CONTENT_SLOT,
				DesignSchemaConstants.CONTENTS_TAG );
		writer.endElement( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.design.elements.DesignVisitor#visitSimpleMasterPage(org.eclipse.birt.report.model.design.elements.SimpleMasterPage)
	 */