Play sound compatibility with rgthree's `Queue Selected Output Nodes`

[bobcate]

This way of adding stuff to the queue does not trigger the the PlaySound nor the SystemNotification nodes. Please make it work with it.

This is how I'm using it if it matters: ~~It works globally as long as I click Queue Promt or hit CTRL+Enter.~~ Okay, I've been testing and my setup in the image is inconsistent. Still, the original issue is true. And as a side, can I request a feature that a sound plays without the need to connect a node?