una/modules/boonex/convos/template/message_label.html

<div class="bx-cnv-grid-field-messages flex items-center">
    <span>__count__</span>
    <bx_if:unread_messages>
        <div class="bx-cnv-grid-field-label bx-def-margin-thd-left bx-def-unit-alert p-0 bg-col-blue2-dark">__unread_messages__</div>
    </bx_if:unread_messages>
    <bx_if:viewer_is_last_replier>
        <div class="bx-cnv-grid-field-label bx-def-margin-thd-left"><i title="<bx_text_attribute:_bx_cnv_you_are_last_replier />" class="sys-icon reply bx-def-font-grayed"></i></div>
    </bx_if:viewer_is_last_replier>
    <bx_if:is_read_by_all>
        <div class="bx-cnv-grid-field-label bx-def-margin-thd-left"><i title="<bx_text_attribute:_bx_cnv_read_by_all />" class="sys-icon check bx-def-font-grayed"></i></div>
    </bx_if:is_read_by_all>
</div>