Use CustomElements.upgradeSubtree() as an easier way of making sure the element is ready

src/scripts/site.js

@@ -709,10 +709,7 @@ var AppInfo = {};
             onError: onRequireJsError
         });
 
-        require(["fetch"], function (fetch) {
-            console.debug("fetch is here", fetch);
-        });
-
+        require(["fetch"]);
         require(["polyfill"]);
         require(["fast-text-encoding"]);
         require(["intersection-observer"]);