Ensure filtering menu is shown when viewing review requests in the admin section

In the URL /admin/db/reviews/reviewrequest/ when you had a small number of
review requests, the filtering menu was not fully shown. I changed the minimum
height for the box displaying the review requests, thus also showing the
filtering menu completely.

Testing Done:
I checked that the UI looks fine on the Chrome and Firefox versions mentioned
in the issue.

Bugs closed: 3222

Reviewed at https://reviews.reviewboard.org/r/5433/
Fix serving uploaded media on a dev server.

The recent fixes for static media resulted in /media/ serving up static
media files instead of the /media/ directory. This happened because the
document_root was no longer set and the static file server was used.
This reverts that part of the code.