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
case FIELD_ON_CREATE :
				String onCreate = IOUtil.readString( in );
				design.setOnCreate( onCreate );
				break;
			case FIELD_ON_RENDER :
				String onRender = IOUtil.readString( in );
				design.setOnRender( onRender );
				break;
			case FIELD_ON_PAGE_BREAK :
				String onPageBreak = IOUtil.readString( in );
				design.setOnPageBreak( onPageBreak );
				break;
			case FIELD_VISIBILITY :
				VisibilityDesign visibility = readVisibility( in );
				design.setVisibility( visibility );
				break;
			case FIELD_ACTION :
				ActionDesign action = readAction( in );
				design.setAction( action );
				break;
			default :
				readStyledElementField( in, design, fieldType );
		}
	}
	protected void readMasterPageField( DataInputStream in,
			MasterPageDesign design, short fieldType ) throws IOException
	{
		switch ( fieldType )
		{
			case FIELD_PAGE_TYPE :