CSR-478 reset keydown after navigation

src/router/index.js

@@ -34,6 +34,8 @@ const routes = [
     path: "/",
     name: "root",
     async beforeEnter(to, from, next) {
+      document.onkeydown = null;
+      
       // If we have no query string, or we don't have the FmgPage query string.
       if (to.query.fmgPage === undefined) {
         await GoToFunnelStartOn404(next);