Comment 2 for bug 1431661

Reviewed: https://reviews.mahara.org/4402
Committed: http://gitorious.org/mahara/mahara/commit/7ab38a32efdda1974e50655e740f66c1df5b1f59
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit 7ab38a32efdda1974e50655e740f66c1df5b1f59
Author: Aaron Wells <email address hidden>
Date: Fri Mar 13 17:03:38 2015 +1300

Don't show the "leave feedback" link to logged-out users

Bug 1431661: Logged-out users can't leave feedback anyway.
When they submit the feedback form, they are prompted to log
in. So, we may as well hide the "leave feedback" link for
logged-out users.

Change-Id: I5441c05e7dab5c50bd4e2ff24b841dfc13b2a133