Bug 156969 [regression]Group header repeat doesn't work in Web Viewer.
Description: Group header repeat doesn't work in Web Viewer. Steps to reproduce: 1. New a data source and dataset, drag the dataset to Layout. 2. Add a group. 3. Set page break in the first data item in table detail row. 4. Preview in web viewer&#12290; Expected result: Group header is repeated in each page. Actual result: No group header repeat effect.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/ir/EngineIRReader.java
rule.setExpression( oper, value1, value2 );
			rule.setStyle( style );
			highlight.addRule( rule );
		}
		return highlight;
	}
	
	protected IStyle readStyle( DataInputStream in ) throws IOException
	{
		String cssText = IOUtil.readString( in );
		IStyle style = (IStyle) reportDesign.getCSSEngine( )
				.parseStyleDeclaration( cssText );
		return style;
	}
	protected ActionDesign readAction( DataInputStream in ) throws IOException
	{
		ActionDesign action = new ActionDesign( );
		int actionType = IOUtil.readInt( in );
		switch ( actionType )
		{
			case ActionDesign.ACTION_BOOKMARK :
				String bookmark = IOUtil.readString( in );
				action.setBookmark( bookmark );
				break;
			case ActionDesign.ACTION_DRILLTHROUGH :
				DrillThroughActionDesign drillThrough = readDrillThrough( in );
				action.setDrillThrough( drillThrough );
				break;
			case ActionDesign.ACTION_HYPERLINK :
				String hyperlink = IOUtil.readString( in );