Only show as playing if Smash is running

[fenhl]

I'm not sure if this is even possible, but it would be nice to have the program only send rich presence status to Discord while Smash is actually running. That way, one could leave it running in the background and not have to worry about forgetting to start/stop it.

[jam1garner]

I'll keep it in mind in the future, just not sure of the best way of accomplishing it atm, will revisit if I come up with a decent idea.