I use the delay to overcome screenswitch issue on logout, i have it set to 1 second so ticket sorts itself out then logout action kicks in 1 second later
This just delays when logout happens at the normal time ie ticket closed, i dont think there is a way it can be set for inactivity for example set at 60 seconds then touch the screen, wait 30 seconds and touch screen again to reset timer, then wait a further 60 seconds for logout to happen.
For logout to happen ticket would always need an entity assigned for the ticket to close, so a timed logout wouldnt work anyway if there wasnt an entity or ticket tag auto assigned to every ticket created