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
LocaleTable.put( locale.getDisplayName( ), locale
							.getLanguage( )
							+ "_" + locale.getCountry( ) ); 
				}
			}
		}
	}
	/**
	 * 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 report
	 *            report file name
	 * @param params
	 *            report parameter map
	 * @return valid web viewer url
	 */
	private static String createURL( String report, Map params )
	{
		if ( params == null || params.isEmpty( ) )
			return createURL( null, report, null, true, null, null );