cleaned up template helpers

UI/Handlebars/Helpers/Html.js

@@ -0,0 +1,10 @@
+'use strict';
+
+define(
+    [
+        'handlebars'
+    ], function (Handlebars) {
+        Handlebars.registerHelper('defaultImg', function () {
+            return new Handlebars.SafeString('onerror="this.src="/content/images/poster-dark.jpg";"');
+        });
+    });