feat: add button to mark all notifications as read and fix action

src/fellchensammlung/templates/fellchensammlung/notifications.html

@@ -5,9 +5,22 @@
 {% block content %}
     <div class="block">
         <h1 class="title is-1">{% translate 'Benachrichtigungen' %}</h1>
-        {% with notifications=notifications_unread %}
-            {% include "fellchensammlung/lists/list-notifications.html" %}
-        {% endwith %}
+        {% if notifications_unread|length > 0 %}
+            <div class="block">
+                <form class="button is-danger" method="POST">
+                    {% csrf_token %}
+                    <input type="hidden" name="action" value="notification_mark_all_read">
+                    <button class="" type="submit" id="submit">
+                        {% trans 'Alle Benachrichtigungen als gelesen markieren' %}
+                    </button>
+                </form>
+            </div>
+        {% endif %}
+        <div class="block">
+            {% with notifications=notifications_unread %}
+                {% include "fellchensammlung/lists/list-notifications.html" %}
+            {% endwith %}
+        </div>
     </div>
 
     <div class="block">

src/fellchensammlung/views.py

@@ -563,7 +563,7 @@ def process_notification_actions(request, action):
             return render(request, "fellchensammlung/errors/403.html", status=403)
         notification.mark_read()
     elif action == "notification_mark_all_read":
-        notifications = Notification.objects.filter(user=request.user, mark_read=False)
+        notifications = Notification.objects.filter(user_to_notify=request.user, read=False)
         for notification in notifications:
             notification.mark_read()
     return None