[misc] Apply xar format.
XWIKI-11176: Use jsTree to rewrite and improve the trees we currently have in XWiki
* jsTree doesn't refresh the root node (in case an operation fails on the top level nodes).
XWIKI-11176: Use jsTree to rewrite and improve the trees we currently have in XWiki
* Use the delete URL to delete tree nodes
* Improve the delete confirmation messages
XWIKI-11176: Use jsTree to rewrite and improve the trees we currently have in XWiki
* Add support for displaying a subtree with a specified root.