[Glitch] Add closed registrations modal

Port 2277913f3f to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/features/ui/components/modal_root.js

@@ -29,6 +29,7 @@ import {
   FilterModal,
   InteractionModal,
   SubscribedLanguagesModal,
+  ClosedRegistrationsModal,
 } from 'flavours/glitch/features/ui/util/async-components';
 import { Helmet } from 'react-helmet';
 
@@ -56,6 +57,7 @@ const MODAL_COMPONENTS = {
   'FILTER': FilterModal,
   'SUBSCRIBED_LANGUAGES': SubscribedLanguagesModal,
   'INTERACTION': InteractionModal,
+  'CLOSED_REGISTRATIONS': ClosedRegistrationsModal,
 };
 
 export default class ModalRoot extends React.PureComponent {