Add a "size by" setting for Map View

The map view seems very limited in its ability to show data besides raw numbers, so I think it would be great to be able to quickly show how impactful an item is on the Map View.

My idea is to add an optional “Size By” setting to the view. This would allow you to reference a number column to determine the size of the item on the map. This of course wouldn’t work with the current map markers, and items would have to be bubbles or something instead. Use case: items are clients, and size would be determined by their account worth