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/WebappAccessor.java
{
	private static boolean applicationsStarted = false;
	/**
	 * Private constructor, so no instances can be created.
	 * 
	 * @see java.lang.Object#Object()
	 */
	private WebappAccessor( )
	{
	}
	/**
	 * Runs a webapp on the server. The webapp is defined in a plugin and the
	 * path is relative to the plugin directory.
	 * <p>
	 * It is assumed that webapp names are unique. It is suggested to create
	 * unique web app names by prefixing them with the plugin id.
	 * </p>
	 * 
	 * @param webappName
	 *            the name of the web app (also knowns as application context)