Add missing management form.

biscuit/apps/alsijil/templates/alsijil/lesson.html

@@ -41,6 +41,8 @@
    <div class="card-body">
     <form method="post">
      {% csrf_token %}
+     {{ personal_note_formset.management_form }}
+
      <table class="table table-striped table-bordered table-hover table-condensed table-responsive w-100">
       <tr>
        <th>{% blocktrans %}Person{% endblocktrans %}</th>