Fix some Releeph jankiness in interacting with the redesign

Summary: Releeph does some really old sketchy stuff in result rendering. Modernize it, remove the holdover/oldschool interface (these were the last two implementors) and make errors a little softer.

Test Plan: Viewed Releeph products and branches.

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D13604