## Ticket
6946: Linked-comment scroll position is inconsistent
## Issues
- If it is a deeply-nested reply, the positioning is incorrect.
- If there are pinned comments, the positioning is way off.
- If there is a delay in mounting, the positioning doesn't happen.
- When clicking on the comment's date to highlight it, the comment goes missing and the scroll position is weird.
## Changes
- Take into account that replies can be linked-comments.
- Perform a "one-time" search for the linked-comment after the initial fetch, if necessary. The expensive DOM search is only be executed minimally.
be9dca362d