WIKI-808: Wiki Tree is automatically closed when accessing sub-page whose name contains accent characters

Problem analysis
	- In ajax call, in case of having accent character in URL or parameters, their value needs to be encoded in HTML form

Fix description:
	- Encode wiki path on initiating Wiki Tree
	- Fix case in initization
Merge commit '3db35fbbdb781d9c61c899e05e87c593aac06e03' into HEAD