Bug 154178 Support projectFolder in BIRT viewer
If the report supports projectFolder, the viewer also need to enhance for this feature.
viewer/org.eclipse.birt.report.viewer/src/org/eclipse/birt/report/viewer/utilities/WebViewer.java
final public static String PREVIEW_MAXROW = "preview_maxrow"; 
	/**
	 * locale mapping. Save some time.
	 */
	public static TreeMap LocaleTable = null;
	static
	{
		
		LocaleTable = new TreeMap( );
		Locale[] locales = Locale.getAvailableLocales( );
		if ( locales != null )
		{
			for ( int i = 0; i < locales.length; i++ )
			{
				Locale locale = locales[i];
				if ( locale != null )
				{
					LocaleTable.put( locale.getDisplayName( ), locale
							.getLanguage( )
							+ "_" + locale.getCountry( ) ); 
				}
			}
		}
	}
	/**
	 * Get web viewer base url.
	 * 
	 * @return base web viewer application url
	 */
	private static String getBaseURL( )