Conpherence - fix default widget on main Conpherence view.

Summary: Fixes T8489. Regression in D13058. Re-write this so a) works and b) works as well cross browser as possible. (big guess on b)

Test Plan: visited /Z1 vs /Z1?settings and saw people widget vs settings widget as respective defaults.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T8489

Differential Revision: https://secure.phabricator.com/D13228