Bug 198839 Hide element on master page works only for PDF output
1. Insert any element (grid, label, image, text) in the header or footer of the master page. 2. Use the Visibility property to hide the element for all outputs. Expected result: Element does not appear in any of the output formats. Actual result: The element is hidden only in PDF.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/html/HTMLPageLM.java
{
	protected IReportContent report;
	protected IPageContent pageContent;
	protected IReportExecutor reportExecutor = null;
	public HTMLPageLM( HTMLReportLayoutEngine engine, IReportContent report,
			IReportExecutor executor, IContentEmitter emitter )
	{
		super( engine.getFactory( ) );
		this.report = report;
		this.reportExecutor = executor;
		this.emitter = emitter;
		this.executor = new ReportItemExecutorBase( ) {
			public void close( )
			{
			}
			public IContent execute( )
			{
				return pageContent;
			}
			public IReportItemExecutor getNextChild( )
			{
				return reportExecutor.getNextChild( );
			}
			public boolean hasNextChild( )
			{