Summary: Ref T4103. Fully modernize the filetree show/hide, durable column show/hide, and profile menu collapse/wide settings.
Test Plan:
- Toggled filetree on/off, reloaded page, setting stuck.
- Same with conpherence column and profile menus.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4103
Differential Revision: https://secure.phabricator.com/D16034
