Currently, if I want to add object tools I have you have to override all of block content:
{% block content %}
<div id="content-main">
<ul class="object-tools">
{% if has_add_permission %}
<li><a href="add/{% if is_popup %}?_popup=1{% endif %}" class="addlink">{% blocktrans with cl.opts.verbose_name|escape as name %}Add {{ name }}{% endblocktrans %}</a></li>
<li><a href="myaction">Myaction</a></li>
{% endif %}
</ul>
<div class="module{% if cl.has_filters %} filtered{% endif %}" id="changelist">
{% block search %}{% search_form cl %}{% endblock %}
{% block date_hierarchy %}{% date_hierarchy cl %}{% endblock %}
{% block filters %}{% filters cl %}{% endblock %}
{% block result_list %}{% result_list cl %}{% endblock %}
{% block pagination %}{% pagination cl %}{% endblock %}
</div>
</div>
{% endblock %}
With a {% block object_tools %}, it could just be:
{% block object_tools %}
<ul class="object-tools">
{% if has_add_permission %}
<li><a href="add/{% if is_popup %}?_popup=1{% endif %}" class="addlink">{% blocktrans with cl.opts.verbose_name|escape as name %}Add {{ name }}{% endblocktrans %}</a></li>
<li><a href="myaction">Myaction</a></li>
{% endif %}
</ul>
{% endblock %}
The object tools area seems to be one of the only places that doesn't already have a block.
