At the end of L-turns, actors often end up with an internal facing not 100% matching the direction of the next cell on their path.
As a result, if they haven't reached their destination yet, Move queues a quick Turn as ChildActivity, which previously was not considered as IsMoving.
However, we don't want those mini-turns to interrupt move animations, so we now consider them a move as well. Additionally, to avoid any issues, we make these mini-turns non-interruptible, just like the MovePart activities already are.
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