Hardcode URL for QR code scanning.

ticdesk/templates/ticdesk/base.html

@@ -58,7 +58,7 @@
        <a class="dropdown-item" href="{% url "org:person" %}">
         {% blocktrans %}Ich{% endblocktrans %}
        </a>
-       <a href="zxing://scan/?ret={% url "org:person_by_uid" "{CODE}" %}">
+       <a href="zxing://scan/?ret={% url "org:person" %}/{CODE}">
         {% blocktrans %}Barcode scannen{% endblocktrans %}
        </a>
        <a class="dropdown-item" href="{% url "org:persons" %}">