Add link to admin page

- Only if user is admin!

InvenTree/InvenTree/urls.py

@@ -48,7 +48,7 @@ urlpatterns = [
 
     url(r'^login/', auth_views.login, name='login'),
     url(r'^logout/', auth_views.logout, {'template_name': 'registration/logout.html'}, name='logout'),
-    url(r'^admin/', admin.site.urls),
+    url(r'^admin/', admin.site.urls, name='inventree-admin'),
 
     url(r'^api/', include(apipatterns)),
     url(r'^api-doc/', include_docs_urls(title='InvenTree API')),

InvenTree/templates/navbar.html

@@ -16,6 +16,9 @@
       <li class='dropdown'>
           <a class='dropdown-toggle' data-toggle='dropdown' href="#"><span class="glyphicon glyphicon-user"></span>{{ user.get_username }}</a>
           <ul class='dropdown-menu'>
+              {% if user.is_staff %}
+              <li><a href="/admin/">Admin</a></li>
+              {% endif %}
               <li><a href="{% url 'logout' %}">Logout</a></li>
           </ul>
       </li>