Website Encyclopedia misses upgrade building costs

[hessenfarmer]

In the Website encyclopedia the buildcost for upgraded Buildings are not shown anymore.
need to check the in game version.
the culprit is most probably the shift of the Build costs to the enhanced building.

moved this from the game issue tracker as it is a website problem

[frankystone]

See: widelands/widelands#4969 (comment)

This is also an issue of wl_map_object_info.

[blotter]

#132