Display user a bug is assigned to in listing

At the moment the "Assigned" column in the bug listing table shows an icon, and the full user details when you move the cursor over it. This makes it very difficult to tell at a glance who things are assigned to. I imagine this was done due to space constraints. Doing something like replacing the icon with the user's initials and keeping the full name display on hover would convey far more information in the same amount of space.