docs: fix fiddles (#39060)

* refactor: replace Array.prototype.forEach.call with plain for-of

* fix: add missing contextIsolation: false

* fix: open links in default browser

docs/fiddles/menus/shortcuts/index.html

@@ -68,6 +68,10 @@
 			</div>
 		</div>
 	</div>
+    <script>
+      // You can also require other files to run in this process
+      require("./renderer.js");
+    </script>
 </body>
 
 </html>