social/mail_activity/static/src/xml/web_kanban_activity.xml

<?xml version="1.0" encoding="UTF-8"?>
<templates xml:space="preserve">

<t t-name="mail.KanbanActivity">
    <div class="o_kanban_inline_block dropdown o_kanban_selection o_mail_activity">
        <a class="dropdown-toggle o_activity_btn" data-toggle="dropdown">
            <span class="fa fa-clock-o fa-lg fa-fw"/>
        </a>
        <ul class="dropdown-menu o_activity" role="menu">
        </ul>
    </div>
</t>

<t t-name="mail.KanbanActivityLoading">
    <li class="text-center o_no_activity">
        <span class="fa fa-spinner fa-spin fa-2x" />
    </li>
</t>

<t t-name="mail.KanbanActivityDropdown">
    <li t-if="_.isEmpty(records)" class="text-center o_no_activity">
        <span>No activities planned.</span>
    </li>
    <li t-if="!_.isEmpty(records)">
        <ul class="nav o_activity_log">
            <t t-foreach="_.keys(records)" t-as="key">
                <t t-set="logs" t-value="records[key]" />
                <li t-foreach="logs" t-as="log" t-att-data-activity-id="log.id" class="o_schedule_activity">
                    <div class="o_activity_title pull-left">
                        <span t-attf-class="o_activity_color_#{key}">
                            <span class="fa fa-clock-o fa-fw" />
                            <span t-att-title="log.date_deadline"><t t-esc="log.label_delay" /></span>
                            <t t-if="log.user_id[0] != uid">
                                <span class="ml4 fa fa-user" />
                                <span><t t-esc="log.user_id[1]" /></span>
                            </t>
                        </span>
                        <span t-attf-class="fa #{log.icon} fa-fw" />
                        <t t-esc="log.title_action or log.activity_type_id[1]" />
                        :
                        <t t-esc="log.summary or ''" />
                    </div>
                </li>
            </t>
        </ul>
    </li>
</t>

</templates>