Allow vehicles to retain target on move command

[Starkku]

Retain target on movement command

• It is now possible for vehicles to retain their target when issued movement command by setting KeepTargetOnMove to true.
  • Note that no check is done whether or not the vehicle or the weapon can actually fire while moving, this is on modder's discretion.
  • The target is automatically reset if the vehicle moves beyond the weapon's range from the target.
• KeepTargetOnMove.ExtraDistance can be used to modify the distance considered 'out of range' from target (it is added to weapon range), negative values work to reduce the distance.

In rulesmd.ini:

[SOMEVEHICLE]                     ; VehicleType
KeepTargetOnMove=false            ; boolean
KeepTargetOnMove.ExtraDistance=0  ; floating point value, distance in cells

[github-actions]

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• compiled-dll-0847f24205b9f72e59501d907ee715f401cf98dd.zip
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[TaranDahl]

Very useful improvement.
Adding a global version tag in [General] would be better I think, as the flags may be used by many UnitTypes.

[mevitar]

In this build I had a weird instance of a subterranean harvester getting stuck underground and only able to move around, but never back up to the ground.
And after a while, the game crashed, but it might not be related to that harvester. Here's the link:
https://drive.google.com/file/d/1Zbul8kBow3Q-zuzHt__L86NkuqHpqYLJ