[FEATURE REQUEST] Key combination to stop or pause the relay

[obernil]

As per title, it would be useful to have a key combination to input to pause or stop the relay to use the keyboard directly on the Pi (without having to ssh to control the Pi).

Alternatively, have the relay pause if the usb cable to the PC gets disconnected.

[quaxalber]

Hi @obernil

I like both ideas. The latter should be easier to implement though. I need to think about the first one a bit more.

Thanks for your input!