MKOB: Extra click after a short pause when closing key at end of transmission

[AESilky]

When closing key at end of transmission, sounder does an extra click after a short pause.

In Key & Sounder mode, when the key is closed at the end of a transmission, the sounder does an extra click after a short pause. The extra click occurs when the reader window displays an asterisk (which normally indicates a missing packet) and an underscore (showing that the circuit is closed. Nothing is displayed on the first click when the key is actually closed (not that it should be).