[bug] Validations show on landing page

[Anthony Garvan]

Validations from forms show up on the main page (and possibly other pages).

Steps to reproduce:

1. Create a new request. Do not fill out fields.
2. Submit the request so that validation errors show up
3. Navigate back to the home page

[CM Lubinski]

Indeed. I'm betting there's a missing flash.now

https://www.pivotaltracker.com/story/show/98398508

[Jessie A. Young]

this was fixed via #795

closing