Sound & Dialog Box on completion of Queue

[Mari Marasu]

Pretty straightforward request here, but I was wondering if we could get a Sound and/or Dialog Box option for the Queue upon completion?

Sometimes I'll set it and forget it's going, and step away longer than I need to.

Subler gets better and better with each release! Thanks a lot!

[Damiano Galassi]

Added in 1226d0a .