Fix formatting on BOSC submission page

[nlharris]

Formatting on https://www.open-bio.org/events/bosc/submit/ is wonky--in particular, the indenting is uneven. I don't think @yochannah has time to fix this, so I'm hoping someone else who's good at Wordpress can help.
We are opening submission TOMORROW. I'd like this page to look a bit less embarrassingly bad!

[saptarsi96]

Hi, @nlharris Can I work on this issue?

[yochannah]

@saptarsi96 please go ahead! let me know if you have any questions on the way :)

You might also be interested in #53 - it has a sort of related but over-arching issue