Titles in the admin UI were previously styled by the 'h1.title' rule,

which we replaced with '.box-title'. However, the admin UI doesn't use

boxes in the same sense as the rest of the UI, due to Django's built-in

styling.
This adds an explicit rule for titles in the admin UI, allowing them

once again to use the same styles as our other boxes.

Saw proper title styles on all the admin pages I saw.