show current status (online/offline/last logged in) of customers

Hi,
first, thanks to the whole team of ISPconfig. It is a pleasure to work with ISPconfig and makes my work a lot more easier.

I've thought about a implementation for the current user status (online/offline) implemented in the customers overview (maybe next to the country) and a timestamp which shows the last logged in date.
With this, it is much more easier to get a overview of the usage of the dashboard (especially for me which use ISPconfig as my main customer panel and invoice management).
I've started some investigation of implementing this inside my system and if someone is interested in it, maybe it's a nice2have feature for the next release which i can investigate further?

What do you think?

Regards