When a user is removed we should remove the right shares

* This means all the shares directly shared with them
* Or all group shares having a special share with them

This patch fixes the operator precedece (AND before OR).
So before this patch:

(share_with = <deleted user> AND share_type = 0) OR share_type=2

So it deleted all user specific shares

Now:
share_with = <deleted user> AND (share_type = 0 OR (share_type=2)