Anyone else experiencing this or find the fix? I just updated to 10.13.5 on my MacBook Pro, and it appears they've removed the ability to use command-option-delete to delete a message and bypass the annoying confirmation warnings. Even when I view the "file" menu, and hit option, it doesn't display anymore. Any ideas would be greatly appreciated on how to restore this. I regularly clear my personal messages off my work laptop and having to confirm each delete is a real PITA. Thanks!