Hi!
Document tree has no limit. For example, I do have a space ADT, which
has a lot of pages. In document tree, I can expand ADT as many times
as I want:
ADT
------ADT
-----------ADT
-----------------ADT
----------------------- page 1
----------------------- page2
----------------------- page 3
I'm using XWiki 1.6.1.13621.
Best regards, Mike