xmpp.chapril.org-conversejs/src/templates/change_status_message.html

<form id="set-custom-xmpp-status" class="pure-form">
<fieldset>
    <span class="input-button-group">
        <input type="text" class="custom-xmpp-status" value="{{status_message}}" placeholder="{{label_custom_status}}"/>
        <input type="submit" class="pure-button button-primary" value="{{label_save}}"/>
    </span>
</fieldset>
</form>