Use built-in Next layout support + lazy load

Instead of doing manual layout switching use the Nextjs nested layout
support. Also add some additional lazy loading of components. This is to
work on performance score re: #2167.

web/components/workers/PushNotificationServiceWorker/PushNotificationServiceWorker.tsx

@@ -0,0 +1,27 @@
+/* eslint-disable react/no-danger */
+import { FC, useEffect } from 'react';
+
+export const PushNotificationServiceWorker: FC = () => {
+  const add = () => {
+    navigator.serviceWorker.register('/serviceWorker.js').then(
+      registration => {
+        console.debug('Service Worker registration successful with scope: ', registration.scope);
+      },
+      err => {
+        console.error('Service Worker registration failed: ', err);
+      },
+    );
+  };
+
+  useEffect(() => {
+    if ('serviceWorker' in navigator) {
+      window.addEventListener('load', add);
+    }
+
+    return () => {
+      window.removeEventListener('load', add);
+    };
+  }, []);
+
+  return null;
+};