NariaReynhard

Aerial bothways quest

8

Slipped out of my mind but I finally cleaned this branch to be able to PR it properly

Update polygone center algorithm

2

As mentioned in [#4965](https://github.com/streetcomplete/StreetComplete/issues/4965) fixed the awkward placement of some of the quest marker in center of polygons. The change is mostly contained in a single folder. Fixes #4965