Desabilitado o botão Add Member se não existem usuários para ser adicionados no slice

portal/templates/slices/slice_detail.html

@@ -537,7 +537,10 @@
                                         <p>{% trans "No other project members to add in your slice." %}</p>
                                     {% endif %}
 
-                                    <button type="submit" name="add_members" class="btn btn-primary">{% trans "Add members" %}</button>
+                                    {% if project_members %}
+                                    	<button type="submit" name="add_members" class="btn btn-primary">{% trans "Add members" %}</button>
+                                    {% endif %}
+                                    
                                 </form>
                             </div>
                         </div>
@@ -601,3 +604,4 @@
 
 {% endblock content %}
 
+