bt5_config: Check the type of argument item_path_list before invoking build

product/ERP5/bootstrap/erp5_business_package/SkinTemplateItem/portal_skins/erp5_business_package/BusinessManager_buildFromDialogParameterJSON.py

+# Convert the item_path_list from str to list type
+if isinstance(item_path_list, str):
+  item_path_list = item_path_list.split(',')
+
 kwargs = {
   'checkNeeded': check_needed,
   'item_path_list': item_path_list}

product/ERP5/bootstrap/erp5_business_package/SkinTemplateItem/portal_skins/erp5_business_package/BusinessManager_buildFromDialogParameterJSON.xml

@@ -50,7 +50,7 @@
         </item>
         <item>
             <key> <string>_params</string> </key>
-            <value> <string>check_needed=False, item_path_list=None</string> </value>
+            <value> <string>check_needed=False, item_path_list=[], **kw</string> </value>
         </item>
         <item>
             <key> <string>id</string> </key>