Role access on note header is empty (and shows a "dash") for non-member of a project
As seen in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/13291#note_40444696:
The access level for the person is 0
which makes the condition - if access = note_max_access_for_user(note)
pass but Gitlab::Access.human_access(access)
returns nil
, which print nothing in the HTML.