add choicescombo.js to scripts (needed for dynamic choices -> defaultchannel field)

pyweb/mumble/templates/mumble/mumble.html

@@ -17,6 +17,7 @@
     <script type="text/javascript" src="{% url django.views.i18n.javascript_catalog %}"></script>
     <script type="text/javascript" src="{{ MUMBLE_DJANGO_URL }}mumble/api/api.js"></script>
     <script type="text/javascript" src="{{ MUMBLE_DJANGO_URL }}mumble/forms/api.js"></script>
+    <script type="text/javascript" src="{{ MUMBLE_DJANGO_URL }}mumble/forms/choicescombo.js"></script>
     <script type="text/javascript" src="{{ MUMBLE_DJANGO_URL }}mumble/forms/{{ RegForm|lower }}.js"></script>
     <script type="text/javascript" src="{{ MUMBLE_DJANGO_URL }}mumble/forms/mumbleform.js"></script>
     <script type="text/javascript" src="{{ MUMBLE_MEDIA_PREFIX }}js/TabScrollerMenu.js"></script>