possibly the url (of the world - not the world collection)
The only problem with this approach is that it might not get a valid link, if the user loads a file from a url. One way would be to not show this additional information when the world is loaded from a file - and not from a select menu.
Currently, in update_url (https://github.com/aroberge/reeborg/blob/master/src/js/utils/parseuri.js#L36) we keep track of the human language used and input mode. This should be changed so that the exact worlds could be shared by using a copy of that url. This means we need to keep track of
The only problem with this approach is that it might not get a valid link, if the user loads a file from a url. One way would be to not show this additional information when the world is loaded from a file - and not from a select menu.