add edit view for waitinglist entry

src/pretix/control/templates/pretixcontrol/waitinglist/edit.html

@@ -0,0 +1,24 @@
+{% extends "pretixcontrol/event/base.html" %}
+{% load i18n %}
+{% load bootstrap3 %}
+{% block title %}{% trans "Edit waiting list entry" %}{% endblock %}
+{% block content %}
+    <h1>{% trans "Edit waiting list entry" %}</h1>
+    <form action="" method="post" class="form-horizontal">
+        {% csrf_token %}
+
+        {% bootstrap_field form.email layout="control" %}
+        {% if names_asked %}
+            {% bootstrap_field form.name_parts layout="control" %}
+        {% endif %}
+        {% if phones_asked %}
+            {% bootstrap_field form.phone layout="control" %}
+        {% endif %}
+        {% bootstrap_field form.itemvar layout="control" %}
+        <div class="form-group submit-group">
+            <button type="submit" class="btn btn-primary btn-save">
+                {% trans "Submit" %}
+            </button>
+        </div>
+    </form>
+{% endblock %}

src/pretix/control/templates/pretixcontrol/waitinglist/index.html

@@ -274,6 +274,7 @@
                                         <i class="fa fa-calendar" aria-hidden="true"></i>
                                     </a>
                                 {% endif %}
+                                <a href="{% url "control:event.orders.waitinglist.edit" organizer=request.event.organizer.slug event=request.event.slug entry=e.id %}" class="btn btn-default btn-sm"><i class="fa fa-pencil"></i></a>
                                 <a href="{% url "control:event.orders.waitinglist.delete" organizer=request.event.organizer.slug event=request.event.slug entry=e.id %}?next={{ request.get_full_path|urlencode }}" class="btn btn-danger btn-sm"><i class="fa fa-trash"></i></a>
                             {% else %}
                                 <button class="btn btn-default btn-sm disabled">