Workable Too Far Tiles

[r3a1d3a1]

If a city grows much more rapidly than an adjacent one, it may take tile more than 3 hexes away from city center that are within the 3 hex radius of another city. This can happen when annexing enemy cities as well. Would be great to have a lens to mark such tiles. I.e. too far from current city center, but within workable radius of another city center.