Add dropzone upload progress to CHANGELOG
This MR adds dropzone upload progress entry to CHANGELOG.
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1125#note_1865958
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This MR adds dropzone upload progress entry to CHANGELOG.
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1125#note_1865958