If WebHome of a space is hidden, tree index of document index is not expandable

Hello,

If WebHome of a space is hidden, tree index of document index is not expandable in "Document Index" menu and "add link to wiki page" macro of the WYSIWYG editor.

To reproduce:

• edit a space WebHome in wiki mode (Encyclopédie.WebHome by example) and select "hidden document" + save
  Of course, this space contain non hidden documents.

• check result (Encyclopédie space contain documents):
  
  and
  

Note: the user can expand tree view if his profil preference is "show hidden document"

Thxs