Hide shifts for non-members.

src/teams/templates/team_base.html

@@ -37,11 +37,13 @@ Team: {{ team.name }} | {{ block.super }}
             </a>
         </li>
 
+        {% if request.user in team.members.all %}
         <li {% if view.active_menu == "shifts" %}class="active"{% endif %}>
             <a href="{% url "teams:shifts" camp_slug=team.camp.slug team_slug=team.slug %}">
                 Shifts
             </a>
         </li>
+        {% endif %}
 
         {% if request.user in team.responsible_members.all %}
         <li {% if view.active_menu == "info_categories" %}class="active"{% endif %}>