removed NzbDrone. namespace, everything is done using require.

UI/Shared/Toolbar/ButtonCollection.js

@@ -1,7 +1,11 @@
 'use strict';
-define(['app', 'Shared/Toolbar/ButtonModel'], function () {
-   return Backbone.Collection.extend({
-        model: NzbDrone.Shared.Toolbar.ButtonModel
+define(
+    [
+        'backbone',
+        'Shared/Toolbar/ButtonModel'
+    ], function (Backbone, ButtonModel) {
+        return Backbone.Collection.extend({
+            model: ButtonModel
+        });
     });
-});