fix _convertChildItem

lib/process/items/item_meta_convert.dart

@@ -65,17 +65,20 @@ class ItemMetaConverter {
   }
 
   static ItemMeta _convertChildItem(ChildItemMetaDTO c) {
-    ChildItemMetaDTO dto = c;
+    List<ItemMeta> _kids = [];
     if (c.childItems != null && c.childItems!.isNotEmpty) {
-      final child = c.childItems!.firstWhere((e) => e.isWorking);
-      dto = child;
+      for (var child in c.childItems!) {
+        if (child.isWorking) {
+          _kids.add(_convertChildItem(child));
+        }
+      }
     }
     return ItemMeta(
       c.name!,
-      measureType: dto.measureTypeName!,
+      measureType: c.measureTypeName!,
       description: c.description ?? c.name!,
-      outputs: _convetOutputsFromCalc(dto.calculator!),
-      childItems: [],
+      outputs: _convetOutputsFromCalc(c.calculator!),
+      childItems: _kids,
     );
   }