Blocker Whenever a window with accessibility buttons(maximize/minimize, collapse/expand, close) exists, like:
<window closable="true" maximizable="true"> <label value="some text here"/> </window>
the following exception is observed in error log
Messages.getNotFound: Message code not found: 2711 2700 not in vi_VN:[org.zkoss.zul.mesg.MZul, /metainfo/mesg/msgzul]
this is caused by 27xx message codes were not found in i18n msgzul except these locales zh_CN, zh_TW, default(en), ja, fr, de.
