Fixed one typo in response_helpers which caused is_admin context variable not to work correctly.
Created new checkLinkNameForId function that checks if link_name is correct when creating new user and modifying existing one. This is now used for validation instead of doesLinkNameBelongToId in UserForm clean_link_name function. The previous validation function didn't allow to create new users and modify linkname of existing ones. Additionally I created new doesLinkNameExist helper function.
{% extends "admin/base_site.html" %}
{% load i18n %}
{% block coltype %}colSM{% endblock %}
{% block breadcrumbs %}<div class="breadcrumbs"><a href="../../">Home</a> › <a href="../">Documentation</a> › Models</div>{% endblock %}
{% block title %}Models{% endblock %}
{% block content %}
<h1>Model documentation</h1>
{% regroup models by app_label as grouped_models %}
<div id="content-main">
{% for group in grouped_models %}
<div class="module">
<h2 id="{{ group.grouper }}">{{ group.grouper|capfirst }}</h2>
<table class="xfull">
{% for model in group.list %}
<tr>
<th><a href="{{ model.app_label }}.{{ model.object_name.lower }}/">{{ model.object_name }}</a></th>
</tr>
{% endfor %}
</table>
</div>
{% endfor %}
</div>
{% endblock %}
{% block sidebar %}
<div id="content-related" class="sidebar">
<div class="module">
<h2>Model groups</h2>
<ul>
{% regroup models by app_label as grouped_models %}
{% for group in grouped_models %}
<li><a href="#{{ group.grouper }}">{{ group.grouper|capfirst }}</a></li>
{% endfor %}
</ul>
</div>
</div>
{% endblock %}