Remove setTimeout() hacks for Javelin behavior initialization
Summary:
- Prioritize higher-priority behaviors on the server.
- Remove setTimeout() hacks.
Test Plan: Loaded Differential, didn't get CSRF races for comment previews.
Reviewers: aran, jg, cpojer
Reviewed By: jg
CC: btrahan, jungejason, aran, epriestley, jg
Differential Revision: 1183