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
/**
	 * Displays the specified url using eclipse SWT browser.
	 * 
	 * @param report
	 *            report report
	 * @param format
	 *            report format
	 * @param browser
	 *            SWT browser instance
	 * @param servletName
	 *            servlet name to viewer report
	 */
	public static void display( String report, String format, Browser browser,
			String servletName )
	{
		startWebApp( );
		browser.setUrl( createURL( servletName, report, format, true, null,
				null )
				+ "&" + new Random( ).nextInt( ) ); 
	}
	/**
	 * Displays the specified url using eclipse SWT browser.
	 * 
	 * @param report
	 *            report report
	 * @param browser
	 *            SWT browser instance
	 * @param params
	 *            the parameter map to set
	 */