R1:27a33896ff1c

Fix a couple of home menu issues for logged-out viewers

Summary: Ref T12174. These items could fatal (`$item not defined`) if the viewer was not logged in.

Test Plan: - Viewed home as a logged-out user.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T12174

Differential Revision: https://secure.phabricator.com/D17274