Increase area of abstreet webviewer for Berlin to include Neukölln

Right now, the webviewer allows to see the city center http://play.abstreet.org/0.2.61/osm_viewer.html?system/de/berlin/maps/center.bin&--cam=14.94/52.50353/13.40353

It would be great to be able to compare the the AB Street Rendering with [the Map Supaplex030 made for Berlin-Neukölln](https://supaplexosm.github.io/strassenraumkarte-neukoelln/?map=micromap#15/52.4811/13.4389), which is about this area `[[52.4557, 13.3985], [52.5005, 13.4863]]`.

It would allow to easily see which tagging is visualized differently with the two viewers.

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Follow up question: Would you be interested in collecting possible issues here in a collective issue?

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Follow up question, out of curiosity: Would it be possible to create a map viewer that shows both maps side by side and moves them at the same time ([Example](https://mc.bbbike.org/mc/#))? From a quick look at the source, it does not look like `OSMViewer` can be controlled from the outside (set center, onmoveend-callback and such).