Reduce dependencies on YUI 2- Added native CSS classes for Tree renderer (named "xowiki-tree" to avoid name clashes).- Made TreeRenderer more configurable, by providing css class names etc.- toc includelet: replaced default (when no style is provided) from yuitree to list + xowiki-tree. The old behavior can be achieved by {{toc -style yuitree}} Note that not all features of the YUI tree might be available- The CSS variant with xowiki-tree can also be used for the folder-tree, but so far, the bootstrap3 renderer is more nice.
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