Render clarification preview summary with markdown

The clarification summary on the team overview page didn't render markdown correctly.

Author: vmcj

webapp/templates/team/partials/clarification_list.html.twig

@@ -64,7 +64,7 @@
 
                 <td>
                     <a data-ajax-modal data-ajax-modal-after="markSeen" href="{{ link }}">
-                        {{ clarification.summary }}
+                        {{ clarification.summary | markdown_to_html | sanitize_html('app.clarification_sanitizer') }}
                     </a>
                 </td>
             </tr>