Display empty content on Manage Profile > Collabs.

:fork_and_knife: 

When a user is not a collaborator on any cookbooks, display some information
that let's them know here is where they would appear.

This should wrap up: https://trello.com/c/pMbl2piT
Not really a huge deal but I'm wondering if we want this in a else block so there isn't an empty `<table>` hanging around in the markup.