Linking to comments in reviews didn't work correctly in all browsers. We

had anchors in place right before the comment's context that URLs should

have been able to link to, but the actual comment text had IDs that were

the same as the anchor names, causing the page to scroll past the

content and to the text itself. This appears to have been done in order

to add highlighting of the linked comment, making use of the :target

CSS rule, but didn't produce ideal results.
We now define those IDs on the main container for the comment. This

ensures that the right place is linked to, and we get the highlighting

capability for free.
This also adds highlighting for replies to comments. This didn't work

at all before, but comment replies now have the IDs and styles necessary

for it.

Tested linking to top-level comments and replies for every type of comment.

Verified they were highlighted and jumped to the right place.