add column to see current bandwith speed of each connected device

[Ibral100]

there is a column for ( received and sent ) KB after redirecting all devices but i think a new one with speed in real time for each device should be useful too .

[hmz777]

Thank you for your comment, real-time download and upload speed indication is implemented, but I have concerns over CPU usage when the target count is high. It is enabled in 2.0-alpha though so you can try it.