Some more minor fixes

packages/app/pages/404/PageNotFound.tsx

@@ -1,10 +1,8 @@
 import React from 'react';
-
-import { FooterMenu } from 'app/components/footerMenu';
-
 import { Link } from 'react-router-dom';
 import { FormattedMessage as Message } from 'react-intl';
 import { Helmet } from 'react-helmet-async';
+import { FooterMenu } from 'app/components/footerMenu';
 
 import styles from './404.scss';
 import messages from './PageNotFound.intl.json';
@@ -14,7 +12,7 @@ export default function PageNotFound() {
   return (
     <div className={styles.page}>
       <Message {...messages.title}>
-        {pageTitle => <Helmet title={pageTitle} />}
+        {pageTitle => <Helmet title={pageTitle as string} />}
       </Message>
 
       <div className={styles.loading}>

packages/app/pages/auth/SuccessOauthPage.tsx

@@ -42,7 +42,7 @@ export default class SuccessOauthPage extends React.Component<{
     return (
       <div className={styles.page}>
         <Message {...messages.title}>
-          {pageTitle => <Helmet title={pageTitle} />}
+          {pageTitle => <Helmet title={pageTitle as string} />}
         </Message>
 
         <div className={styles.wrapper}>

packages/app/pages/rules/RulesPage.tsx

@@ -98,7 +98,7 @@ export default class RulesPage extends Component<{
     return (
       <div>
         <Message {...messages.title}>
-          {pageTitle => <Helmet title={pageTitle} />}
+          {pageTitle => <Helmet title={pageTitle as string} />}
         </Message>
 
         <div className={styles.rules}>