added is standart field to item groups

jey_erp/custom_fields.py

@@ -121,6 +121,16 @@ def create_custom_fields():
                 in_list_view=1,
                 in_standard_filter=1
             )
+        ],
+        "Item Group": [
+            dict(
+                fieldname='is_standard',
+                label='Is Standard',
+                fieldtype='Check',
+                insert_after='is_group',
+                hidden=1,
+                read_only=1
+            )
         ],        
         "Bank": [
             dict(