Places Nearby issues with polygon POIs

[davecraig]

There are a couple of issues with my initial naive implementation of Places Nearby.

1. There's are lots of duplications. We crop point POIs to the tile that they are on, but allow polygon POIs to cross over. This results in multiple entries which aren't being de-duplicated.
2. Clicking on a polygon POI in the Places Nearby list pin points the POI at the nearest point to our current location.

I guess both of these issues would be resolved by having a point only POI FeatureTree which we could use for Places Nearby, but is that over the top? Or could we allow multiple Geometry for POI Features i.e. Point and Polygon?