Set units of Network Transmit/Receive to bytes and not bytes per second

[phillbarber]

Whilst playing with the dashboard, I set up some additional where clauses to filter by a specific docker container I was interested in. I noticed that after a performance test, the Network Transmit/Receive graph was showing what looked like the peak throughput consistently (flat line) despite the container sending and receiving no traffic at that point in time.

I think the issue is that the rx_bytes and tx_bytes measurements are accumulative and actually indicate the total data in and out. This is why I propose that the units should just be bytes and not bytes per second.

Let me know if this makes sense!

Thanks