Resolve "Frontend for group types"

Closes #240 (closed)

aleksis/core/templates/core/edit_group_type.html

+{# -*- engine:django -*- #}
+
+{% extends "core/base.html" %}
+{% load material_form i18n %}
+
+{% block browser_title %}{% blocktrans %}Edit group type{% endblocktrans %}{% endblock %}
+{% block page_title %}{% blocktrans %}Edit group type{% endblocktrans %}{% endblock %}
+
+{% block content %}
+
+  <form method="post">
+    {% csrf_token %}
+    {% form form=edit_group_type_form %}{% endform %}
+    {% include "core/save_button.html" %}
+  </form>
+
+{% endblock %}