[openstreetmap-website] Let history viewer respect middle-click and Ctrl+click (#1020)

[Midgard]

It really doesn't work in Firefox. Seems like jQuery-simulate isn't doing its job properly then.

IMHO, it's a bit overkill as well when you could just do something like

```js
function clickChangeset(id, e) {
  var url = "/changeset/"+id;
  if (e.button===1 || e.ctrlKey) {
    window.open(url);
  } else {
    window.location = url;
  }
}
```

---
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/issues/1020#issuecomment-125726554
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