Symbol Search: Allow ctrl-click with no hover

Summary: Fix T8710. I had hopes of doing something cleaver with highlighted (Like trying to understand foo.bar when clicking bar, but I obviously didn't do it.

Test Plan: ctrl-click.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: joshuaspence, epriestley, gena2x, Korvin

Maniphest Tasks: T8710

Differential Revision: https://secure.phabricator.com/D13550