Prevent system sleep during active session

[segevfiner]

trafficstars

Summary of the new feature / enhancement

Similar to remote desktop, keeping the system from idle sleeping while an SSH session is in progress.

Due to modern standby, this might prove difficult as modern standby simply ignores power requests in many cases and even when it does, it often turns off the network. So even tools like PowerToys awake are unable to help.

Proposed technical implementation details (optional)

No response

[mgkuhn]

See also #1712