Fix an issue with multiple "open" statuses and the "View All" button on Projects
Summary: See IRC. We construct this a little bit wrong if there are multiple "open" statuses. Use a more modern construction.
Test Plan: Hit ?statuses=wontfix,invalid, etc. Clicked "view all" from projects.
Reviewers: btrahan, chad
Reviewed By: chad
Subscribers: epriestley
Differential Revision: https://secure.phabricator.com/D8854