[turba] create new address book

[Philip Steeman]

Hello,
it seems to be impossible to make a new address book when the datatree 
is set to none.

However I can select 'create addressbook' and I get an answer 'The 
address book "test" was created successfully'.

Is this a normal behaviour? If yes: why can I select it?

Enable the datatree is not an option because it is too slow with a few 
1000 users.

Philip