Add support for custom sell cursors.

OpenRA.Mods.Common/Orders/GlobalButtonOrderGenerator.cs

@@ -83,7 +83,14 @@ namespace OpenRA.Mods.Common.Orders
 		public override string GetCursor(World world, CPos cell, int2 worldPixel, MouseInput mi)
 		{
 			mi.Button = MouseButton.Left;
-			return OrderInner(world, mi).Any() ? "sell" : "sell-blocked";
+
+			var cursor = OrderInner(world, mi)
+				.SelectMany(o => o.Subject.TraitsImplementing<Sellable>())
+				.Where(Exts.IsTraitEnabled)
+				.Select(si => si.Info.Cursor)
+				.FirstOrDefault();
+
+			return cursor ?? "sell-blocked";
 		}
 	}
 }

OpenRA.Mods.Common/Traits/Sellable.cs

@@ -27,6 +27,9 @@ namespace OpenRA.Mods.Common.Traits
 		[Desc("Skip playing (reversed) make animation.")]
 		public readonly bool SkipMakeAnimation = false;
 
+		[Desc("Cursor type to use when the sell order generator hovers over this actor.")]
+		public readonly string Cursor = "sell";
+
 		public override object Create(ActorInitializer init) { return new Sellable(init.Self, this); }
 	}