R1:ec57678f7097

Mark deleted Phriction pages as closed.

Summary:
This replaces D4042 and gives you the option to search for existing Phrication
documents only.

Test Plan:
# Reindexed ALL THE THINGS, saw existing documents show up in search in all cases.
# Deleted a document and saw it only show up when "Open and Closed Documents" are
shown.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4289