add report: first login and last logout for each day

[mathisdt]

feature request (received by mail):

If I walk through my university I often leave the range of an WiFi AP and later coming again in to the range, this make TWT generate events every time . This is OK, but if I export the list at the end of the month, I have a lot of events every day. But I only need the first even (login) and the last one (logout). can you add a function in the reports to only count first login and last logout for the day?