This fixes several issues with the new infobox implementation. To start with,

we now had one DOM element per possible infobox, which was a lot of elements

when looking at a dashboard. During the conversion, I also lost the timeout

before the infobox was shown. These two things combined so that if you quickly

scrolled your mouse across a bunch of users, it would pop up a ton of

infoboxes.
All the views for any given type now share a single element, and coordinate a

bit so that if you switch which user you're looking at (or which bug), the

infobox will update immedatiely rather than waiting for a new timeout.
This also fixes a small styling issue that presented when users had their

profile set to private.

Looked at a dashboard and tested several of the weird cases that arose when

mousing over the "submitter" column. Set my profile to private and looked at

the infobox that resulted.