In 14.04 I could close a meld window by pressing Ctrlq. But in 16.04 the behavior of that key combination has changed to terminate all currently open invocations of meld rather than just the one I pressed the key combination in.
I also tried Ctrlw, but that can only close individual tabs and the window remains open even if all tabs inside it have been closed.
Is there a keyboard combination which will close a single meld window in 16.04?