social/mail_full_expand/views/assets.xml

<?xml version="1.0" encoding="utf-8"?>

<!-- © 2014-2015 Grupo ESOC <http://www.grupoesoc.es>
     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html). -->

<openerp>
<data>

<template id="assets_backend"
          name="mail_full_expand assets"
          inherit_id="web.assets_backend">
    <xpath expr="." position="inside">
        <link rel="stylesheet"
              href="/mail_full_expand/static/src/css/mail_full_expand.less"/>
        <script type="text/javascript"
                src="/mail_full_expand/static/src/js/mail_full_expand.js"/>
    </xpath>
</template>

</data>
</openerp>