Colocar object-tools como barra de ações

sigi/static/css/change_form.css

@@ -0,0 +1,17 @@
+.sigi-object-tools {
+    background-color: var(--object-tools-bg);
+}
+
+.sigi-object-tools>ul {
+    display: flex;
+    padding: 5px 15px;
+}
+
+.sigi-object-tools>ul>li {
+    padding-right: 20px;
+}
+
+.sigi-object-tools>ul>li>a {
+    color: var(--object-tools-fg);
+    border-color: var(--object-tools-fg);
+}

sigi/templates/admin/change_form.html

@@ -1,3 +1,20 @@
 {% extends 'admin/change_form.html' %}
+{% load i18n static admin_modify %}
 
-{% block breadcrumbs %}{% endblock %}
+{% block extrastyle %}
+  {{ block.super }}
+  <link rel="stylesheet" type="text/css" href="{% static 'css/change_form.css' %}">
+{% endblock %}
+{% block breadcrumbs %}
+  {% if not is_popup %}
+  <div class="sigi-object-tools">
+    <ul>
+      {% block object-tools-items %}
+        {% change_form_object_tools %}
+      {% endblock %}
+    </ul>
+  </div>
+  {% endif %}
+{% endblock %}
+
+{% block object-tools %}{% endblock %}

sigi/templates/admin/change_form_object_tools.html

@@ -0,0 +1,18 @@
+{% load i18n admin_urls %}
+{% block object-tools-items %}
+  <li>
+    {% url opts|admin_urlname:'history' original.pk|admin_urlquote as history_url %}
+    <a href="{% add_preserved_filters history_url %}" class="historylink">
+      <i class="left material-icons" aria-hidden="true">history</i>
+      {% trans "History" %}
+    </a>
+  </li>
+  {% if has_absolute_url %}
+    <li>
+      <a href="{{ absolute_url }}" class="viewsitelink">
+        <i class="left material-icons" aria-hidden="true">web</i>
+        {% trans "View on site" %}
+      </a>
+    </li>
+  {% endif %}
+{% endblock %}