Overhaul target line rendering:

- Targets are now defined by the activities
- Queued activities are shown
- Support custom attack colors

OpenRA.Mods.Common/Activities/Move/MoveAdjacentTo.cs

@@ -99,13 +99,8 @@ namespace OpenRA.Mods.Common.Activities
 			// Target is equivalent to checkTarget variable in other activities
 			// value is either lastVisibleTarget or target based on visibility and validity
 			var targetIsValid = Target.IsValidFor(self);
-			var oldUseLastVisibleTarget = useLastVisibleTarget;
 			useLastVisibleTarget = targetIsHiddenActor || !targetIsValid;
 
-			// Update target lines if required
-			if (useLastVisibleTarget != oldUseLastVisibleTarget && targetLineColor.HasValue)
-				self.SetTargetLine(useLastVisibleTarget ? lastVisibleTarget : target, targetLineColor.Value, false);
-
 			// Target is hidden or dead, and we don't have a fallback position to move towards
 			var noTarget = useLastVisibleTarget && !lastVisibleTarget.IsValidFor(self);
 
@@ -149,5 +144,11 @@ namespace OpenRA.Mods.Common.Activities
 
 			return Target.None;
 		}
+
+		public override IEnumerable<TargetLineNode> TargetLineNodes(Actor self)
+		{
+			if (targetLineColor.HasValue)
+				yield return new TargetLineNode(useLastVisibleTarget ? lastVisibleTarget : target, targetLineColor.Value);
+		}
 	}
 }