Make attack moving and guarding use a grouped order

OpenRA.Game/Orders/GenericSelectTarget.cs

@@ -10,7 +10,7 @@
 #endregion
 
 using System.Collections.Generic;
-using OpenRA.Graphics;
+using System.Linq;
 using OpenRA.Traits;
 
 namespace OpenRA.Orders
@@ -53,8 +53,7 @@ namespace OpenRA.Orders
 				world.CancelInputMode();
 
 				var queued = mi.Modifiers.HasModifier(Modifiers.Shift);
-				foreach (var subject in Subjects)
-					yield return new Order(OrderName, subject, Target.FromCell(world, cell), queued);
+				yield return new Order(OrderName, null, Target.FromCell(world, cell), queued, null, Subjects.ToArray());
 			}
 		}
 

OpenRA.Mods.Common/Orders/GuardOrderGenerator.cs

@@ -34,9 +34,7 @@ namespace OpenRA.Mods.Common.Orders
 			world.CancelInputMode();
 
 			var queued = mi.Modifiers.HasModifier(Modifiers.Shift);
-			foreach (var subject in Subjects)
-				if (subject != target)
-					yield return new Order(OrderName, subject, Target.FromActor(target), queued);
+			yield return new Order(OrderName, null, Target.FromActor(target), queued, null, Subjects.Where(s => s != target).ToArray());
 		}
 
 		public override void Tick(World world)

OpenRA.Mods.Common/Traits/AttackMove.cs

@@ -117,8 +117,7 @@ namespace OpenRA.Mods.Common.Traits
 
 				// Cells outside the playable area should be clamped to the edge for consistency with move orders
 				cell = world.Map.Clamp(cell);
-				foreach (var s in subjects)
-					yield return new Order(orderName, s.Actor, Target.FromCell(world, cell), queued);
+				yield return new Order(orderName, null, Target.FromCell(world, cell), queued, null, subjects.Select(s => s.Actor).ToArray());
 			}
 		}