Basic menuing

web/index.html

@@ -41,6 +41,11 @@
 </head>
 <body>
   <script>
+    // disable right clicks
+    document.body.addEventListener('contextmenu', (event) => {
+      event.preventDefault();
+    });
+
     window.addEventListener('load', function(ev) {
       // Download main.dart.js
       _flutter.loader.loadEntrypoint({