If I have an async block which returns a `xwikirenderingerror` div, once the async is resolved, the `xwikirenderingerror` is not clickable to expand it.
Example - with the office server offline, view this in a page:
{{async}} {{office reference="Untitled2.odt"/}} {{/async}}
It will give you a (seemingly) expandable error div, but you can't click it to see the description (stack trace).
I think a fix could be firing 'xwiki:dom:updated' [somewhere here?](https://github.com/xwikisas/xwiki-platform/blob/380c2ca7ab0ed9ee1e564c6d0e1a94c69a5f7f64/xwiki-platform-core/xwiki-platform-web/xwiki-platform-web-war/src/main/webapp/resources/uicomponents/async/async.js#L32) - I didn't test this.
