[0.23][Bug/Interface] Overlapping cities
I captured two enemy cities that were build rather close together. When upgrading these cities, I was able to get the upgrades from one city build close enough to the upgrades from the other city to make the city outlines overlap.

While this isn't really wrong, it certainly doesn't look all that well. Maybe in this case the outline should be changed as if there was only one city? Or maybe the cities should be merged to make one bigger city?