Issue #246 used new vouchers and voucher_types study properties from the extended context

smash/web/templates/sidebar.html

@@ -66,12 +66,14 @@
         </a>
     </li>
 
+    {% if has_vouchers %}
     <li data-desc="vouchers">
         <a href="{% url 'web.views.vouchers' %}">
             <i class="fa fa-user-md"></i>
             <span>Vouchers</span>
         </a>
     </li>
+    {% endif %}
 
     <li data-desc="configuration" class="treeview">
         <a href="#">
@@ -83,8 +85,12 @@
         <ul class="treeview-menu">
             <li><a href="{% url 'web.views.configuration' %}">General</a></li>
             <li><a href="{% url 'web.views.languages' %}">Languages</a></li>
+            {% if has_voucher_types %}
             <li><a href="{% url 'web.views.voucher_types' %}">Voucher types</a></li>
+            {% endif %}
+            {% if has_vouchers %}
             <li><a href="{% url 'web.views.workers' 'VOUCHER_PARTNER' %}">Voucher partners</a></li>
+            {% endif %}
             <li><a href="{% url 'web.views.workers' 'HEALTH_PARTNER' %}">Health partners</a></li>
             <li><a href="{% url 'web.views.edit_study' study_id %}">Study</a></li>
         </ul>