properly detect connection issues and show appropriate message.

UI/Shared/NotificationCollection.js

@@ -1,7 +1,7 @@
 "use strict";
 define(['app', 'Shared/NotificationModel'], function () {
 
-    var collection = Backbone.Collection.extend({
+    var notificationCollection = Backbone.Collection.extend({
 
         model: NzbDrone.Shared.NotificationModel,
 
@@ -40,36 +40,34 @@ define(['app', 'Shared/NotificationModel'], function () {
 
             $(document).ajaxError(function (event, xmlHttpRequest, ajaxOptions) {
 
-                var model = new NzbDrone.Shared.NotificationModel();
-                model.set('level', 'error');
-
-                if (xmlHttpRequest.status === 0 && xmlHttpRequest.readyState === 0) {
-                    model.set('title', "Connection Failed");
-                    model.set('message', "NzbDrone Server Not Reachable. make sure NzbDrone is running.");
-                    self.push(model);
-                    return false;
-                }
-
                 //don't report 200 error codes
                 if (xmlHttpRequest.status >= 200 && xmlHttpRequest.status <= 300) {
                     return undefined;
                 }
 
-                //doesn't report aborted requests
+                //don't report aborted requests
                 if (xmlHttpRequest.statusText === 'abort') {
                     return undefined;
                 }
 
+                var model = new NzbDrone.Shared.NotificationModel();
+                model.set('level', 'error');
+
+                if (xmlHttpRequest.status === 0 && xmlHttpRequest.readyState === 0) {
+                    model.set('title', "Connection Failed");
+                    model.set('message', "NzbDrone Server Not Reachable. make sure NzbDrone is running.");
+                } else {
                     model.set('title', ajaxOptions.type + " " + ajaxOptions.url + " : " + xmlHttpRequest.statusText);
                     model.set('message', xmlHttpRequest.responseText);
-                self.push(model);
+                }
 
+                self.push(model);
                 return false;
             });
         }
     });
 
-    return new collection();
+    return new notificationCollection();
 });