Yep, it's cmd-backspace, which is unfortunately cumbersome, but it works and it's easy enough to remember.
That said, how the menu items appear always baffles me. Want to search for a file by name? Hit Ctrl-Shift-Command-F. How did I discover this? Open the menu and start banging different modifier keys till "Find" turns into "Find by Name..." I'm sure this behavior is as old as Macs, but it's an odd quirk, one that I still stumble over from time to time.