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
property( obj, Cell.COL_SPAN_PROP );
		property( obj, Cell.ROW_SPAN_PROP );
		property( obj, Cell.DROP_PROP );
		property( obj, Cell.HEIGHT_PROP );
		property( obj, Cell.WIDTH_PROP );
		property( obj, Cell.EVENT_HANDLER_CLASS_PROP );
		property( obj, Cell.ON_PREPARE_METHOD );
		property( obj, Cell.ON_CREATE_METHOD );
		property( obj, Cell.ON_RENDER_METHOD );
		writeStyle( obj );
		writeContents( obj, Cell.CONTENT_SLOT, null );
		writer.endElement( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.design.elements.DesignVisitor#visitGrid(org.eclipse.birt.report.model.design.elements.GridItem)
	 */
	public void visitGrid( GridItem obj )
	{
		
		boundColumnsMgr.dealGrid( obj, getModule( ) );
		writer.startElement( DesignSchemaConstants.GRID_TAG );
		super.visitGrid( obj );
		writeColumns( obj, GridItem.COLUMN_SLOT );
		writeContents( obj, GridItem.ROW_SLOT, null );
		writer.endElement( );
	}
	/*
	 * (non-Javadoc)