修复:复合实体无法获得ColorIndex的问题

src/DatabaseServices/Entity/CompositeEntity.ts

@@ -78,8 +78,9 @@ export class CompositeEntity extends Entity
     }
     get ColorIndex(): number
     {
-        return super._Color;
+        return super.ColorIndex;
     }
+
     set ColorIndex(color: number)
     {
         if (color !== this._Color)