allows inserting something in lower nav bar

basetheme_bootstrap/templates/basetheme_bootstrap/basePasteur.html

@@ -59,6 +59,8 @@
         <div class="header__logo-wrapper">
             <img src="{% sstatic '/img/institut-pasteur-logo-2020.png'%}" alt="Accueil">
         </div>
+        {% block lower_nav_bar_before_menu %}
+        {% endblock lower_nav_bar_before_menu %}
         <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbar__middle__collapse"
                 aria-controls="navbarCollapse" aria-expanded="false" aria-label="Toggle navigation">
             <span class="navbar-toggler-icon"></span>