Added in a hidden input for "tunnel" set to "null"

The idea is to utilise the existing saveChanges function in IndexBean.java
that the edit page posts to. Consequently, the wizard will need to have all
the same inputs that need to be POSTed as the edit page does.

apps/i2ptunnel/jsp/wizard.jsp

@@ -60,6 +60,7 @@
                   %><h4><%=intl._("Wizard completed")%></h4><%
                 } %>
                 <input type="hidden" name="page" value="<%=request.getParameter("page")%>" />
+                <input type="hidden" name="tunnel" value="null" />
                 <input type="hidden" name="nonce" value="<%=wizardBean.getNextNonce()%>" />
             </div>