message: Adjust co-m-pane__heading margin
diff: .co-m-pane__heading {
  display: flex;
  justify-content: space-between;
  - margin: 0 ($grid-gutter-width / 2) $grid-gutter-width 0;
  + margin: 0 0 $grid-gutter-width;
  &--center {
  justify-content: center;
  }
  