[Redesign] Mobile/Phone design pass

Summary: Ref T8099, Quick descent pass at making header, object lists, tables, filter view, mobile friendly.

Test Plan:
Test home, differential diff, maniphest task, new task, search, and a few other views.

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T8099

Differential Revision: https://secure.phabricator.com/D12984