What does this MR do?
Display no error message if user is not logged in when using issuable search bar.
What are the relevant issue numbers?
https://gitlab.com/gitlab-org/gitlab-ce/issues/34141#note_33295457
Display no error message if user is not logged in when using issuable search bar.
https://gitlab.com/gitlab-org/gitlab-ce/issues/34141#note_33295457