fixes button styling on export report button (HospitalRun/hospitalrun-frontend/#1527)

Author: jackcmeyer

app/incident/reports/template.hbs

@@ -48,7 +48,7 @@
       </table>
     </div>
     <div class="panel-footer">
-      <a href={{csvExport}} target="_blank" download="{{reportTitle}}.csv" class="btn btn-default">{{t 'incident.buttons.export'}}</a>
+      <a href={{csvExport}} target="_blank" download="{{reportTitle}}.csv" class="btn btn-primary">{{t 'incident.buttons.export'}}</a>
     </div>
   </div>
 {{/if}}