R1:d2568ac463da

fix getAvailableIcons so uiexample works

Summary: D4027 introduced this along with associated awesomeness.

Test Plan: viewed uiexample and saw some actions. also no more errors.

Reviewers: epriestley

Reviewed By: epriestley

CC: chad, aran, Korvin

Differential Revision: https://secure.phabricator.com/D4066