muk_web/muk_web_preview/static/src/xml/sidebar.xml

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

<!--

    Copyright (c) 2017-2019 MuK IT GmbH.

    This file is part of MuK Preview 
    (see https://mukit.at).

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program. If not, see <http://www.gnu.org/licenses/>.

  -->

<templates>

<t t-extend="Sidebar">
	<t t-jquery=".o_dropdown_menu t[t-raw*='item.label']" t-operation="before">
		<span t-if="section.name == 'print' and !item.callback and !item.url" 
			class="fa fa-file-text-o mk_preview_report" 
			t-attf-title="Preview #{item.title or ''}" 
			t-att-data-index="item_index" />
	</t>
</t>

</templates>