I am not sure whether this is a bug or a suggestion post.
I just double clicked the sleep bonus button (zZz). It happens all too often. I have a laptop with a touchpad (no space for a mouse) and often double click by mistake.
Because of this I have to wait 4 minutes before I can use sleep bonus and continue with what I am doing.
I know it might seem like a minor inconvenience, but it would be great if the sleep bonus button had some double click protection - maybe a 1 second timer between registering clicks, so folks don't accidentally switch it on then straight off again.
I can't think of a reason anyone would need sleep bonus for less than 1 second or would need to use multiple clicks on the button.
Just an idea.