finish off styling for sample dataset re-add link.

resources/frontend_client/app/admin/databases/partials/database_list.html

@@ -35,7 +35,7 @@
             </tbody>
         </table>
         <div class="pt4" ng-if="!hasSampleDataset">
-            <span class="p2 text-italic" ng-class="{'border-top': databases.length > 0}"><a class="link" href="" ng-click="addSampleDataset()">Bring the sample dataset back</a></span>
+            <span class="p2 text-italic" ng-class="{'border-top': databases.length > 0}"><a class="text-grey-2 text-brand-hover no-decoration" href="" ng-click="addSampleDataset()">Bring the sample dataset back</a></span>
         </div>
     </section>
 </div>