[Glitch] Add hover cards in web UI

Port e89317d4c1

Co-authored-by: Renaud Chaput <renchap@gmail.com>
Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/components/status_header.jsx

@@ -51,6 +51,7 @@ export default class StatusHeader extends PureComponent {
         target='_blank'
         onClick={this.handleAccountClick}
         rel='noopener noreferrer'
+        data-hover-card-account={status.getIn(['account', 'id'])}
       >
         <div className='status__avatar'>
           {statusAvatar}