"newline" special character in page name breaks the navigation tree

Ilie Andriuta to reproduce and test you can also simply put a link like this in an existing page:

[[link to page with new line>>Parent.Chi
ld.WebHome]]

and create the child page from the missing page link.

page names are used as HTML IDs of navigation trees items without any escaping which is breaking jstree

There is escaping, otherwise the tree wouldn't be usable at all because all document references contain special CSS characters (like : and .). The problem is that jsTree performs its own custom CSS escaping based on a regular expression, instead of using CSS.escape(), and this custom code doesn't handle correctly the new line character.