R1:2e6332f456c9

Update SSH Keys Settings layout

Summary: Uses new ObjectBox with table.

Test Plan: clicked on add new key, clicked edit key, everythink works

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D7904