CSS fix to workaround twbs/bootstrap#9855
CSS fix to workaround twbs/bootstrap#9855

See: twbs/bootstrap#9855

in particular this comment:
https://github.com/twbs/bootstrap/issues/9855#issuecomment-25214238

Have to watch that issue for a better fix.

Signed-off-by: Daniel Halperin <1a02732a15f637c31107256cbee5819e36aa7c67@cs.washington.edu>

uwescience/myria-web,uwescience/myria-web,uwescience/myria-web,uwescience/myria-web