Summary:
Fixes T1127
For now, colons are taken literally. This means you can't type scoped
searches. This will likely change when search gets re-designed
Test Plan:
SearchBar.cjsx got a test for this. The class needs more tests
edgehill --test
Reviewers: bengotow
Reviewed By: bengotow
Subscribers: mg
Maniphest Tasks: T1127
Differential Revision: https://review.inboxapp.com/D1490
