display humnan readable form instead of db key

CHANGELOG

@@ -5,6 +5,7 @@ smasch (1.1.0~beta.0-1) unstable; urgency=low
   * bug fix: when study column resigned is disabled then changing data in
     subject was not possible (#494)
   * bug fix: problem with 2 factor auhentication fixed (#486)
+  * bug fix: voucher status is displayed properly in edit subject page (#490)
   * bug fix: add worker did not contain tooltip about worker locations (#487)
   * bug fix: cancel button in edit location pointed to list of languages (#497)
   * bug fix: when editing/adding/listing study subject highlight proper menu

smash/web/templates/includes/subject_vouchers_box.html

@@ -32,7 +32,7 @@
                             <td>{{ voucher.voucher_type }}</td>
                             <td>{{ voucher.issue_date }}</td>
                             <td>{{ voucher.expiry_date }}</td>
-                            <td>{{ voucher.status }}</td>
+                            <td>{{ voucher.get_status_display }}</td>
                             <td>{{ voucher.usage_partner.first_name }} {{ voucher.usage_partner.last_name }}</td>
                             <td>{{ voucher.feedback }}</td>
                             <td><a href="{% url 'web.views.voucher_edit' voucher.id %}"><i class="fa fa-edit"></i></a>