Wikimedia Bugzilla is closed!

On beta labs,
* make sure you're in Topics and Posts view
* choose a topic that isn't collapsed
* Close topic
* Then reload the page.
The closed topic appears white with "This topic closed by <USER>"  and is collapsed.

Now Reopen topic.
The closed topic redisplays gray.  But it remains collapsed.

Expected behavior:
* In at least this circumstance (viewing topics and posts, topic wasn't collapsed before), reopening a topic should expand it so you see its posts.
* For bonus points, have nice animation of expansion and transition from closed white to normal gray.