Default group required

* adds access checks depending on the current group confgiguration of a user
* removes buttons for adding/editing or removing data if default group is not set for a user
* removes buttons for adding/removing related data in unshared interventions
* removes shared-user setting from share menu of an intervention if user is not zb or ets
* renames has_access() from intervention Model into is_shared_with() for more clarity
* fixes bug in group check in_group() from utils.py

intervention/templates/intervention/detail/view.html

@@ -27,16 +27,21 @@
                 <button class="btn btn-default btn-modal mr-2" title="{% trans 'Share' %}" data-form-url="{% url 'intervention:share-create' intervention.id %}">
                     {% fa5_icon 'share-alt' %}
                 </button>
+                {% if is_zb_member %}
                 <a href="{% url 'home' %}" class="mr-2">
                     <button class="btn btn-default" title="{% trans 'Run check' %}">
                         {% fa5_icon 'star' %}
                     </button>
                 </a>
+                {% endif %}
+                {% if is_ets_member %}
                 <a href="{% url 'home' %}" class="mr-2">
                     <button class="btn btn-default" title="{% trans 'Record' %}">
                         {% fa5_icon 'bookmark' %}
                     </button>
                 </a>
+                {% endif %}
+                {% if is_default_member %}
                 <a href="{% url 'home' %}" class="mr-2">
                     <button class="btn btn-default" title="{% trans 'Edit' %}">
                         {% fa5_icon 'edit' %}
@@ -46,6 +51,7 @@
                     {% fa5_icon 'trash' %}
                 </button>
                 {% endif %}
+                {% endif %}
             </div>
         </div>
     </div>