kicker: Fix z-position when moving during runtime.

VisualPinball.Unity/VisualPinball.Unity/VPT/Kicker/KickerColliderComponent.cs

@@ -63,6 +63,7 @@ public override void OnTransformationChanged(float4x4 currTransformationMatrix)
 			// update kicker center, so the internal collision shape is correct
 			ref var kickerData = ref PhysicsEngine.KickerState(ItemId);
 			kickerData.Static.Center = currTransformationMatrix.c3.xy;
+			kickerData.Static.ZLow = currTransformationMatrix.c3.z;
 		}
 	}
 }