Add ability to select/add multiple audio files to cues

Add ability to select/add multiple audio files to cues -

We setup a Welcome slide that displays while congregants are entering the sanctuary prior to the service start. We also setup postlude slides to cycle through at the end of the service. We also always add a collection of 20 audio tracks to these slides which play through the sound system while these slides are presented.

Currently, we can only add one audio file at a time. It would be so convenient if we could add multiple (or a collection) at one time for this.

Thanks!