web/web_x2many_delete_all/static/src/xml/web_x2many_delete_all.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- Copyright 2016 Onestein
     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl). -->

<templates>
    <t t-extend="ListView">
        <t t-jquery=".o_list_record_delete" t-operation="inner">
            <span class="fa fa-trash-o hidden" title="Delete all"/>
        </t>
    </t>
</templates>