More specific permission controls

It would be nice to have more control over permissions, for example, I want my Presenter guys to be able to change the slides, formatting, order, etc for a given song, but not be able to change what the song is. We’ve had issues where they accidentally remove songs from the cue list, and that can be a hassle during practice, so I’d like to remove that possibility without making it so they can’t edit song slides at all.

I'd also like some more control over permissions. As another example, we've had whole services deleted/copied/dates changed through presenter, which then causes issues with the rostering side of things. An ability to edit services but not completely delete/copy/change dates would be great.