Am I missing something here, or does this really not make any sense? You open the quick menu using Ctrl-K, presumably because you prefer using keyboard shortcuts, and then you wonder why you can't close that little window with your mouse? Seriously, sometimes I just can't wrap my head around comments like this. No offence intended, of course!
On a different note, I do have a question about the introductory text: "Go to a page or do something." I just went and got myself a beer. Is that what is meant here, or am I missing the point? Asking for a friend...