fixed wrong palette remapping for neutral buildings in editor

for TEMPERAT (fields) and DESERT (buildings, trees, rocks)

OpenRA.Game/Traits/EditorAppearance.cs

@@ -13,6 +13,7 @@ namespace OpenRA.Traits
 	public class EditorAppearanceInfo : TraitInfo<EditorAppearance>
 	{
 		public readonly bool RelativeToTopLeft = false;
+		public readonly bool UseTerrainPalette = false;
 	}
 
 	public class EditorAppearance { }