## 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.
## Issue
The loading circle wasn't showing up, causing confusion.
Splitting CSS doesn't seem trivial as there seems to be a huge dependency on the load order. Pretty much similar to what this person is facing https://lihautan.com/css-code-splitting/#the-problem
## Change
This reverts videojs-specific changes from 4d638bcf.
