Modernize Phriction ordering/paging

Summary: Ref T7803. Fixes T7809. Move Phriction away from getReversePaging() / getPagingColumn().

Test Plan: Paged "All Documents", "Updated", and viewed document hierarchy.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: ite-klass, epriestley

Maniphest Tasks: T7809, T7803

Differential Revision: https://secure.phabricator.com/D12360