Fix issue in thesis list (labels singular/plural)

_includes/list-theses.html

@@ -95,8 +95,8 @@
             <li>
                 {% if author %}{{ author.name }} {{ author.surname }}{% if detailsString %} ({{ detailsString }}){% endif %}<br />{% endif %}
                 <b>{{ publication.title }}</b>{% if publication.doi or publication.link %} (<a href="{% if publication.doi %}https://doi.org/{{ publication.doi }}{% else %}{{ publication.link }}{% endif %}">link</a>){% endif %}<br />
-                {% if supervisorsString %}Supervisor{% if publication.supervisor.size > 1 %}s{% endif %}: {{ supervisorsString }}{% if cosupervisorsString %} |{% endif %}{% endif %}
-                {% if cosupervisorsString %}Co-supervisor{% if publication.co-supervisor.size > 1 %}s{% endif %}: {{ cosupervisorsString }}{% endif %}
+                {% if supervisorsString %}Supervisor{% if supervisors.size > 1 %}s{% endif %}: {{ supervisorsString }}{% if cosupervisorsString %} |{% endif %}{% endif %}
+                {% if cosupervisorsString %}Co-supervisor{% if cosupervisors.size > 1 %}s{% endif %}: {{ cosupervisorsString }}{% endif %}
                 {% if publication.awards %}<br />Awards: {{ publication.awards }}{% endif %}
             </li>
         {% endfor %}