Show error message on invalid authentication.

If an invalid authentication, onSuccess is not called, only onComplete.  Show the error message in onComplete.

close #222.

browserid/static/dialog/controllers/authenticate_controller.js

-/*jshint brgwser:true, jQuery: true, forin: true, laxbreak:true */                                             
-/*global Channel:true, CryptoStubs:true, alert:true, errorOut:true, setupChannel:true, getEmails:true, clearEmails: true, console: true, _: true, pollTimeout: true, addEmail: true, removeEmail:true, BrowserIDNetwork: true, BrowserIDWait:true, BrowserIDErrors: true, PageController: true */ 
+/*jshint brgwser:true, jQuery: true, forin: true, laxbreak:true */
+/*global Channel:true, CryptoStubs:true, alert:true, errorOut:true, setupChannel:true, getEmails:true, clearEmails: true, console: true, _: true, pollTimeout: true, addEmail: true, removeEmail:true, BrowserIDNetwork: true, BrowserIDWait:true, BrowserIDErrors: true, PageController: true */
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
@@ -52,7 +52,7 @@
     "#forgotpassword click": function(event) {
       this.close("authenticate:forgotpassword");
     },
-            
+
     "#create click": function(event) {
       this.close("authenticate:createuser");
     },
@@ -72,13 +72,13 @@
       BrowserIDIdentities.authenticateAndSync(email, pass, function(authenticated) {
         if (authenticated) {
           self.doWait(BrowserIDWait.authentication);
-        } else {
-          self.find("#nosuchaccount").hide().fadeIn(400);
         }
       },
       function(authenticated) {
         if (authenticated) {
           self.close("authenticate:authenticated");
+        } else {
+          self.find("#nosuchaccount").hide().fadeIn(400);
         }
       }, self.getErrorDialog(BrowserIDErrors.authentication));
     }