Reset network traffic on start option

[Saya47]

Checklist

• I've looked through the documentation and existing open issues for similar feature requests.

Describe the feature request

It would be amazing if we could have an option to reset network traffic on start or maybe with a hotkey. I mean the All: section of the Network widget. This way, I can know how much data I have used in a session, I'm on limited data plans, and it would help a lot. Thanks, I hope you consider this.

[ClementTsang]

Hm, that might be doable? There's a reset key (Shift + R) already, but the way we currently query total network traffic is just by grabbing it from what the system reports, so that doesn't get "reset" - but I can look at how that might look if we do it.