Fixed #7467 -- Added a template block to override the admin welcome message.

        </div>

        {% if user.is_active and user.is_staff %}

        <div id="user-tools">

            {% block welcome-msg %}

                {% trans 'Welcome,' %}

                <strong>{% firstof user.get_short_name user.get_username %}</strong>.

            {% endblock %}

            {% block userlinks %}

                {% url 'django-admindocs-docroot' as docsroot %}

                {% if docsroot %}