R1:06338db5bb1e

Make PhabricatorObjectItemListView extend AphrontTagView

Summary: Provide all the setSigil() / setID() sorts of calls. No functional changes.

Test Plan: Viewed object item lists.

Reviewers: chad, btrahan

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D6112