Bug 193231 RCP designer does not display Preview tab and View menu.
On RCP designer, Preview tab is missing and View Report menus. Please check the attached screen shot for detail.
viewer/org.eclipse.birt.report.viewer/src/org/eclipse/birt/report/viewer/utilities/WebViewer.java
stopWebApp( );
	}
	/**
	 * Displays the specified url.
	 * 
	 * @param report
	 *            report report
	 * @param format
	 *            report format
	 */
	public static void display( String report, String format )
	{
		display( report, format, true );
	}
	/**
	 * Displays the specified url.
	 * 
	 * @param report
	 * @param format
	 * @param allowPage
	 */
	public static void display( String report, String format, boolean allowPage )
	{
		String root = null;
		if ( WebViewer.PDF.equalsIgnoreCase( format ) )
		{
			root = createURL( "run", report, format, true, null, null ); 
		}
		else
		{