Put older milestones back on the left
Summary:
This reverts commit 3f50ba90f1d0d30008ea13457dd90f8ea83f25b7.
Fixes T10412. Everyone seems to hate this and I don't feel strongly about it. It's definitely a little weird.
Test Plan: Straight revert.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10412
Differential Revision: https://secure.phabricator.com/D15644