fix theme submission layout (bug 950693)

https://bugzilla.mozilla.org/show_bug.cgi?id=950693

![screen shot 2013-12-16 at 2 34 54 pm](https://f.cloud.github.com/assets/211578/1758604/8e93397c-6691-11e3-903c-8948f21b65ae.png)