[Redesign] Fix Pager on Phriction History
Summary: Ref T8099, Fixes layout of the Pager, all adds distinction to the current pager button.
Test Plan: Edit a Phriction document 100 times. Get a pager.
Reviewers: btrahan, epriestley
Reviewed By: epriestley
Subscribers: epriestley, Korvin
Maniphest Tasks: T8099
Differential Revision: https://secure.phabricator.com/D13549