Create NotAuthenticated event

Closes https://code.vereign.com/code/dashboard/issues/522

javascript/src/iframe/viamapi-iframe.js

@@ -1169,6 +1169,8 @@ connection.promise.then(parent => {
     localStorage.getItem("token") === null ||
     localStorage.getItem("authenticatedIdentity") === null
   ) {
+    const event = createEvent("", "NotAuthenticated");
+    parent.onEvent(event);
     localStorage.removeItem("uuid");
     localStorage.removeItem("token");
     localStorage.removeItem("authenticatedIdentity");