Fix direction changes for //undo

[SirYwell]

Overview

Fixes #2971

Description

With the coordinated undo, we now reuse MutableTileChange and MutableEntityChange across create and remove changes. This however requires us to also adjust the change in that regard. Unconditionally writing the currently expected value is most likely the simplest solution.

This is not a problem for other change types as we don't have the create/remove situation there.

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