Service Desk with images/attachments
- Part of https://gitlab.com/gitlab-org/gitlab-ee/issues/1675, extension of https://gitlab.com/gitlab-org/gitlab-ee/issues/149.
- Exclusive ~"EE Premium" feature only
- External user attaches images to initial email. Those images are included in the generated issue description.
- Images in subsequent external emails from the external user result in images included in the issue comments.
- If a support user includes images in the comments, they result in outgoing emails with attached images.