Fix #541 -- Allow delete waitinglist entries (#544)

Add new action "delete" for each waiting list entries

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

@@ -0,0 +1,19 @@
+{% extends "pretixcontrol/event/base.html" %}
+{% load i18n %}
+{% load bootstrap3 %}
+{% block title %}{% trans "Delete entry" %}{% endblock %}
+{% block content %}
+	<h1>{% trans "Delete entry" %}</h1>
+	<form action="" method="post" class="form-horizontal">
+		{% csrf_token %}
+		<p>{% blocktrans %}Are you sure you want to delete the following waiting list entry <strong>{{ entry }}</strong>?{% endblocktrans %}</p>
+		<div class="form-group submit-group">
+            <a href="{% url "control:event.orders.waitinglist" organizer=request.event.organizer.slug event=request.event.slug %}" class="btn btn-default btn-cancel">
+                {% trans "Cancel" %}
+            </a>
+            <button type="submit" class="btn btn-danger btn-save">
+                {% trans "Delete" %}
+            </button>
+        </div>
+	</form>
+{% endblock %}

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

@@ -96,6 +96,7 @@
                     <th>{% trans "On the list since" %}</th>
                     <th>{% trans "Status" %}</th>
                     <th>{% trans "Voucher" %}</th>
+                    <th></th>
                 </tr>
                 </thead>
                 <tbody>
@@ -133,6 +134,13 @@
                                 </button>
                             {% endif %}
                         </td>
+                        <td>
+                            {% if not e.voucher %}
+                                <a href="{% url "control:event.orders.waitinglist.delete" organizer=request.event.organizer.slug event=request.event.slug entry=e.id %}" class="btn btn-danger btn-sm"><i class="fa fa-trash"></i></a>
+                            {% else %}
+                                <span class="btn btn-danger btn-sm disabled"><i class="fa fa-trash"></i></span>
+                            {% endif %}
+                        </td>
                         <td class="text-right">
                         </td>
                     </tr>