R1:b5b8d0982ca6

Make "Current Application" imply "Open documents in..."

Summary: This is probably consistent with user intent like 95% of the time, let's try making it default and documenting it.

Test Plan: Searched in "Current Application" in Maniphest.

Reviewers: chad

Reviewed By: chad

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D12512