Add a "Date Updated (Oldest First)" sort order to Maniphest
Summary: Closes T8484
Test Plan: Create sample tasks then navigate to Maniphest > Advanced Search and choose choose "Date Updated (Oldest First)" in the "Order By" select box.
Reviewers: lpriestley, epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: epriestley, Korvin
Maniphest Tasks: T8484
Differential Revision: https://secure.phabricator.com/D13237