Overhaul target line rendering:

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

OpenRA.Mods.Common/Traits/AutoTarget.cs

@@ -311,8 +311,6 @@ namespace OpenRA.Mods.Common.Traits
 
 		void Attack(Actor self, Target target, bool allowMove)
 		{
-			self.SetTargetLine(target, Color.Red, false);
-
 			foreach (var ab in ActiveAttackBases)
 				ab.AttackTarget(target, false, allowMove);
 		}