Windows/List Key Plug for Logitech K280e, parameterized

First thing I do when I get a new keyboard is yank out the 'windows' key (and the 'list' key), as it interferes with my games.

Problem solved. But it introduces a new problem: a dust collecting hole in the keyboard.

So I needed a plug to fill the windows key hole.
This will fit a Logitech K280e.

I made it parameterized in openscad, so it was easy to make another one for the list key hole, and to allow users to make it fit different keyboards (that, however, must have a separate hole for each key, or the model wont fit).