Overhaul target line rendering:

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

OpenRA.Mods.Common/Scripting/Properties/DeliveryProperties.cs

@@ -34,8 +34,8 @@ namespace OpenRA.Mods.Common.Scripting
 		public void DeliverCash(Actor target)
 		{
 			var t = Target.FromActor(target);
-			Self.SetTargetLine(t, Color.Yellow);
 			Self.QueueActivity(new DonateCash(Self, t, info.Payload, info.PlayerExperience));
+			Self.ShowTargetLines();
 		}
 	}
 
@@ -66,8 +66,8 @@ namespace OpenRA.Mods.Common.Scripting
 			var level = gainsExperience.Level;
 
 			var t = Target.FromActor(target);
-			Self.SetTargetLine(t, Color.Yellow);
 			Self.QueueActivity(new DonateExperience(Self, t, level, deliversExperience.PlayerExperience));
+			Self.ShowTargetLines();
 		}
 	}
 }