Could you add 
counter for selected objects per screen shot 
in the  new GUI ?
Benefits:
(1) N could visually see if there is a bug
i.e. 
if the server shows X for any screen shot Y
although N  has selected none of the
listed objects for an operation O
then N can immediatelly see 
that there is a bug in the server software
where
X = number of selected objects
Y = number of listed objects per screen
N = user/GUI software developer
O = delete operation to name one
       which is hard to test for developers
       and hard to recover for users