Change popup_loading message from "页面载入中，请稍候……" to "等待页面加载完毕……".
Change popup_loading message from "页面载入中，请稍候……" to "等待页面加载完毕……".

code review url:
http://codereview.appspot.com/3932042
linqiangl/compatibility-detector,linqiangl/compatibility-detector,linqiangl/compatibility-detector