manager: add a title to page add/edit template

combo/manager/templates/combo/page_add.html

@@ -1,6 +1,14 @@
 {% extends "combo/manager_base.html" %}
 {% load i18n %}
 
+{% block appbar %}
+{% if object.id %}
+<h2>Edit Page</h2>
+{% else %}
+<h2>New Page</h2>
+{% endif %}
+{% endblock %}
+
 {% block content %}
 
 <form method="post" enctype="multipart/form-data">