Make multi-stage lessons show the individual stages in the menu

While we are about it, make AbstractLesson.getLink() include
the category (i.e. menu), so that the menu selection script
will still work.


git-svn-id: http://webgoat.googlecode.com/svn/trunk@183 4033779f-a91e-0410-96ef-6bf7bf53c507

webgoat/main/project/JavaSource/org/owasp/webgoat/lessons/AbstractLesson.java

@@ -575,7 +575,10 @@ public abstract class AbstractLesson extends Screen implements Comparable
 	link.append(WebSession.SCREEN);
 	link.append("=");
 	link.append(getScreenId());
-
+	link.append("&");
+	link.append(WebSession.MENU);
+	link.append("=");
+	link.append(getCategory().getRanking());
 	return link.toString();
     }