Kylin help has duplicate items

Kylin help has duplicate items, refer to 'help_duplicate_record.png'.
In some cases, such as opening two clients at the same time, the help of kylin client will appear duplicate items.
Through the code debug, I find the 'initWebConfigInfo' function has been called twice, but the array parameter 'Config.documents' has not been cleaned at the beginning, so after the second call, the array appears duplicate items.
I have added code of initial array in the patch, please review it, thanks!