Basic Conpherence Search in Thread
Summary: Adds a search bar toggle and results for searching inside a Conpherence Room. The UI of the results itself are not styled yet, and will follow up with another diff.
Test Plan: Go to Conpherence, search for "asdf", get lots of results. Search for nothing, get no change, search for something fictitious, get no threads found (will follow up with search result UI).
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D16697