If you’re a long-time iTunes power user, you’ll probably remember the good old days when you could open a playlist in a second iTunes window — a feature that Apple in its infinite wisdom decided to callously discard alongside the whole new user interface in iTunes 11. Even after iTunes resurrected the sidebar in iTunes 12.4 last year, the ability to open playlists in a new window still remained conspicuously absent. Until iTunes 12.6…
