Thanks for the link! That's actually displaying corerctly. You can drag your snippet by clicking and holding it on this icon. Here's a demo: https://twitter.com/rawcodeio/status/655678301617438721
I am not sure it is useful though, what developer doesn't have copy/paste as a muscle memory action? Furthermore the window management alone would be just a tad annoying to make it useful.
It is neat though, but a novelty as far as actual usefulness goes.
It is also kind of convenient to drag snippets into your editor, because you don't have to select the code (which would also happen via mouse). In any case it is not the only option to grab your snippets, so you can still go cmd+c / cmd+v. No harm done in giving the option imho.
I'm also looking into generally copying a snippet to the clipboard when hitting cmd+c on a single snippet page - That would probably be my personal favorite. Maybe even yours as well?