templates/program_form: add a link to program episodes

aircox/templates/aircox/program_form.html

@@ -7,7 +7,9 @@
 {% endblock %}
 
 {% block page-form-actions %}
+<a class="button secondary" href="{% url 'episode-list' parent_slug=object.slug %}">{% trans "Episodes" %}</a>
 {% if object and object.pk and request.user.is_superuser %}
+&nbsp;
 <button type="button"
     class="button secondary"
     @click="$refs['group-users-modal'].open({id: {{ object.editors_group_id }}, name: '{{ object.editors_group.name }}' })">{% translate "Editors" %}</button>