Ui improvements
- revert of wrong patch
- spall margin change
Explanation with screenshots here - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/579#note_1845510
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Explanation with screenshots here - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/579#note_1845510