[Evil Front Part 3]: input event listener comment (metaKey is not ctrl key)

[Vadim Venediktov]

As the MDN web docs says metaKey is the Windows key.

  // You can send a message with cmd/ctrl+enter
  input.addEventListener("keydown", event => {
    if (event.keyCode === 13 && event.metaKey) {
      event.preventDefault();
      submitMessage(input);
    }
  });

Actually you I wasn't able to trigger this event in Firefox on Ubuntu.