Move various other callsites away from callsigns

Summary: Ref T4245. These mostly relate to building URIs.

Test Plan: Tried to hunt down as many of these in the UI as I could. Some are a bit tricky but they should be low-risk.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T4245

Differential Revision: https://secure.phabricator.com/D14933