Remove feedback.gitlab.com link, use up-for-grabs label
Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/15441
Is https://gitlab.com/gitlab-org/gitlab-ce/issues?label_name=up-for-grabs
the best source for issues accepting merge requests?
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/15441
Is https://gitlab.com/gitlab-org/gitlab-ce/issues?label_name=up-for-grabs
the best source for issues accepting merge requests?