message: Add dl to storage class details page
diff: @@ -107,10 +107,12 @@ const StorageClassDetails: React.SFC<StorageClassDetailsProps> = ({ obj }) => (
  </ResourceSummary>
  </div>
  <div className="col-sm-6">
  + <dl className="co-m-pane__details">
  <DetailsItem label="Reclaim Policy" obj={obj} path="reclaimPolicy" />
  <dt>Default Class</dt>
  <dd>{isDefaultClass(obj).toString()}</dd>
  <DetailsItem label="Volume Binding Mode" obj={obj} path="volumeBindingMode" />
  + </dl>
  </div>
  </div>
  </div>
  