Make it possible to list and invalidate active sessions

calsocial/templates/account/active-sessions.html

@@ -0,0 +1,15 @@
+{% extends 'account/settings-base.html' %}
+
+{% block settings_content %}
+<h2>{% trans %}Active sessions{% endtrans %}</h2>
+<ul>
+    {% for sess in sessions %}
+    <li>
+        {{ sess['ip'] }}
+        {% if sess.sid != session.sid %}
+        <a href="{{ url_for('account.invalidate_session', sid=sess.sid) }}">{% trans %}Invalidate{% endtrans %}</a>
+        {% endif %}
+    </li>
+    {% endfor %}
+</ul>
+{% endblock settings_content %}