As a user, when one of my posts or topics is hidden, I want to be notified.
This will match the Echo Notification that is sent when my edits are reverted/undone.
The link in the Notification, should be:
* For Topics: a link to the topic page. -- e.g. https://www.mediawiki.org/wiki/Topic:S8h4mz2dpdlnlks1
* For Posts: a link to the specific post, at the topic page, with the `&topic_showPostId=` string so that the hidden comment can be seen/uncollapsed. -- e.g. https://www.mediawiki.org/w/index.php?title=Topic:S836or43j4lecbje&topic_showPostId=s8h56a8we272arhg#flow-post-s8h56a8we272arhg