Bug 119343 Smoke: Report design can't be edited.
Description: Report design can't be modified. Steps to reproduce: 1. Create a report. 2. Preview and then edit it. 3. Preview again. 4. It is not modified.
viewer/org.eclipse.birt.report.viewer/src/org/eclipse/birt/report/viewer/utilities/WebViewer.java
/**
	 * Get web viewer base url.
	 * 
	 * @return base web viewer application url
	 */
	private static String getBaseURL( )
	{
		return "http://" + WebappAccessor.getHost( ) + ":" 
			+ WebappAccessor.getPort( )	+ "/viewer/"; 
	}
	
	/**
	 * Create web viewer url to run the report.
	 * 
	 * @param servletName servlet name to viewer report
	 * @param report report file name 
	 * @param format report format
	 * @return valid web viewer url
	 */
	private static String createURL( String servletName, String report, String format )
	{
		String encodedReportName = null;
		String encodedDocumentName = null;
		
		try
		{
			encodedReportName = URLEncoder.encode( report, "utf-8" ); 
		}
		catch ( UnsupportedEncodingException e )
		{