Adding additional css classes to menu bar and ability to be duplicated

basetheme_bootstrap/templates/basetheme_bootstrap/login_menu.html

 {% load i18n %}
 {%if not request.user.is_authenticated %}
-<li class="nav-item"><a class="nav-link" href="{% url 'basetheme_bootstrap:login'%}?next={{ request.path|urlencode }}">{% block sign_in_word %}{%trans "Login "%}{% endblock %}<i class="fa fa-sign-in"></i></a></li>
+<li class="nav-item {{li_additional_class}}"><a class="nav-link" href="{% url 'basetheme_bootstrap:login'%}?next={{ request.path|urlencode }}">{% block sign_in_word %}{%trans "Login "%}{% endblock %}<i class="fa fa-sign-in"></i></a></li>
 {%else%}
-<li class="nav-item dropdown">
+<li class="nav-item dropdown {{li_additional_class}}">
     <a class="nav-link dropdown-toggle"
        href="#"
-       id="dropdown-user"
+       id="dropdown-user{{suffix_id}}"
        data-toggle="dropdown"
        aria-haspopup="true"
        aria-expanded="false"
     ><i class="fa fa-user-circle-o"></i> <span class="caret"></span></a>
-    <div class="dropdown-menu dropdown-menu-right" aria-labelledby="dropdown-user">
+    <div class="dropdown-menu dropdown-menu-right" aria-labelledby="dropdown-user{{suffix_id}}">
         {%if request.user.is_staff %}
             <a  class="dropdown-item" href="/admin/"><i class="fa fa-cogs"></i> {%trans "Admin"%}</a>
             <div class="dropdown-divider"></div>