Tree Harvester stops working if tree is unreachable

Issue description

If a tree is not reachable, the tree harvester will stop working until you undesignate that problematic tree. The tree is usually on an unreachable plane or on the side of a cliff.

Expected behavior

If the harvester cannot reach the tree, it should unmark it (or possibly highlight it red for the user to notice) and move on to the next one.

Game version

v0.4.8

Thank you for pointing this out, I have had such a problem with tree designations in a unreachable area preventing trees from being harvested in general

This was fixed in v0.4.13.