Replace IOrderGenerator.RenderBeforeWorld with world-sorted .Render.

Range circles have been moved to RenderAfterWorld for now.

OpenRA.Mods.RA/Orders/SetChronoTankDestination.cs

@@ -38,13 +38,12 @@ namespace OpenRA.Mods.RA.Orders
 		}
 
 		public void Tick( World world ) { }
+		public IEnumerable<IRenderable> Render(WorldRenderer wr, World world) { yield break; }
 		public void RenderAfterWorld( WorldRenderer wr, World world )
 		{
 			wr.DrawSelectionBox(self, Color.White);
 		}
 
-		public void RenderBeforeWorld( WorldRenderer wr, World world ) { }
-
 		public string GetCursor(World world, CPos xy, MouseInput mi)
 		{
 			if (!world.LocalPlayer.Shroud.IsExplored(xy))