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
Map customProperties = IOUtil.readMap( in );
				if ( customProperties != null )
				{
					design.getCustomProperties( ).putAll( customProperties );
				}
				break;
			default :
				throw new IOException( "unknow field type " + fieldType );
		}
	}
	protected void readStyledElementField( DataInputStream in,
			StyledElementDesign design, short fieldType ) throws IOException
	{
		switch ( fieldType )
		{
			case FIELD_STYLE_NAME :
				String styleName = IOUtil.readString( in );
				design.setStyleName( styleName );
				break;
			case FIELD_MAP :
				MapDesign map = readMap( in );
				design.setMap( map );
				break;
			case FIELD_HIGHLIGHT :
				HighlightDesign highlight = readHighlight( in );
				design.setHighlight( highlight );
				break;
			default :
				readReportElementField( in, design, fieldType );
		}