Highlight/zoom-to multireplied post when hovering/clicking multireply
Highlight/zoom-to multireplied post when hovering/clicking multireply

And fix #/post-123 bud (should be #post-123 with no '/').

debiki/debiki-server-old,debiki/debiki-server-old,debiki/debiki-server-old,debiki/debiki-server-old