When a user pastes a Phabricator URI into the search box, redirect to the URI
When I do this dumb thing, redirect to the URI as though the global search was a URI bar.
Maybe only I am dumb like this, but I don't think it'll hurt anything.
Test Plan: pasted a URI and hit return; tried to eat a rock
Reviewers: amckinley, joshuaspence
Reviewed By: joshuaspence
Maniphest Tasks: T5378
Differential Revision: https://secure.phabricator.com/D20510