I think I've found a bug (or it's a feature? Maybe I'm missing something)
I can delete selection if I have only slots or only bones selected.
But - if I have selected multiple slots and bones, I can't delete the selection.
I know that when I delete the bones, it will delete everything what is attached. But usually I have the bone expanded so I see what's attached, then I shift+select or cmd+select all Items I need to delete and delete it.
Is that a bug or a feature? 😃
Also… a "Delete key" keyboard shortcut would be very handy.