Changing default fallback behaviour of hovercard view

Summary:
Refs T1048; Depends on D5571 - Use names instead of substr($handle->getType(), 0, 1).$handle->getAlternateID(), which did not work for 70% of the handles

This, of course, breaks UI Examples, which was pretty off before anyway.

Unbreak UIExamples.

Test Plan: UIExamples, Hovercard Controller in human test mode

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1048

Differential Revision: https://secure.phabricator.com/D5572