Restore vanilla components

app/javascript/mastodon/components/missing_indicator.js

@@ -0,0 +1,12 @@
+import React from 'react';
+import { FormattedMessage } from 'react-intl';
+
+const MissingIndicator = () => (
+  <div className='missing-indicator'>
+    <div>
+      <FormattedMessage id='missing_indicator.label' defaultMessage='Not found' />
+    </div>
+  </div>
+);
+
+export default MissingIndicator;