odoo/addons/mail/static/src/xml/suggestions.xml

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

    <t t-name="mail.suggestions">
        <div class="oe_suggestions_groups">No groups</div>
    </t>

    <!-- Suggested groups -->
    <div t-name="mail.suggestions.groups" class="oe_sidebar_group">
        <p class="oe_suggestion_display">Suggested Groups</p>
        <div class="oe_suggest_groups">
            <t t-foreach="widget.suggestions" t-as="result">
                <div class="oe_suggested_groups">
                    <div class="oe_group_images">
                        <img class="oe_group_image_content oe_open_group" t-attf-src="{result.image}" t-attf-id="{result.id}"/>
                    </div>
                    <div class="oe_group">
                        <a class="oe_group_name oe_open_group" t-attf-id="{result.id}">
                            <t t-esc="result.name"/>
                        </a>
                        <a class="oe_remove_suggested_group" rol="button" t-attf-id="{result.id}">
                            <span class="oe_kanban_action oe_kanban_action_a">X</span>
                        </a>
                        <br/>
                        <button type="button" t-att-id="result.id" class="oe_join_group">Join Group</button>
                    </div>
                </div>
            </t>
        </div>
    </div>


</template>