alerting user now when newest version of github foxx app is already installed

js/apps/system/aardvark/frontend/js/collections/foxxCollection.js

@@ -27,6 +27,9 @@
           result = true;
         },
         error: function(data) {
+          if (data.responseText.indexOf() !== -1) {
+            alert("Already newest app version installed.");
+          }
           result = false;
         }
       });