R1:c4856c37e7a6

Fix content overflow in user hovercards

Summary:
Fixes T13273. This element is a bit weird, but I think I fixed it without breaking anything.

The CSS is used by project hovercards and user hovercards, but they each have a class which builds mostly-shared-but-not-really-identical CSS, instead of having a single `View` class with modes. So I'm not 100% sure I didn't break something obscure, but I couldn't find anything this breaks.

The major issue is that all the text content has "position: absolute".