Add border-bottom on age color mapping legend row
Border should match the title border above
From https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7198#note_32414687
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Border should match the title border above
From https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7198#note_32414687