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

<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>