[#1830] User profile option to filter requests by status

Fixes #1830 

Filters on `latest_status` because filtering by `status` searches all
states a request has ever been in.

![user-profile-search](https://cloud.githubusercontent.com/assets/282788/4541430/cffad36a-4e13-11e4-9b43-580a048e3c02.gif)

@brfairless feel free to weigh in