Add legacy mode

src/easymatcher_worker.py

@@ -52,6 +52,8 @@ class EasymatcherWorker(nlp_ws.NLPWorker):
             raise UnsupportedOperation(
                 "'labels_path' should be passed with 'task_options'."
             )
+        if isinstance(labels_path_list, str):  # gui legacy mode
+            labels_path_list = [labels_path_list]
 
         if (labels_name_list := task_options.pop("labels_name", None)) is None:
             # Get labels filename