una/template/agents_comment_loading.html

<div id="__html_id__" class="__style_prefix__-agents-loading">
    <bx_text:_sys_agents_assistants_chats_msg_loading />
</div>
<script language="javascript">
    bx_loading('__html_id__', true); 
    
    var __js_object___interval = setInterval(function() {
        if(window['__js_object__'] == undefined) 
            return; 
        
        clearInterval(__js_object___interval); 
        __js_object__._getCmt('#cmt__id__', __id__);
    }, 200);
</script>