popup_help_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <template id="assets_backend" name="custom assets" inherit_id="web.assets_backend">
            <xpath expr="." position="inside">
                <script type="text/javascript"
                        src="/help_popup/static/src/js/popup_help.js"/>
            </xpath>
        </template>
    </data>
</openerp>