List feature

+ implemented list feature
+ implemented category feature

invsystem/user_manager/templates/bases/navbar.html

@@ -37,6 +37,7 @@
             <li><a href="{% url 'index' %}">Home</a></li>
             {% if user.is_authenticated %}
                 <li><a href="{% url 'add' %}">Objekt inventarisieren</a></li>
+                <li><a href="{% url 'objlist' %}">Inventar</a></li>
             {% endif %}
         </ul>
         {% if user.is_authenticated %}