Call set_state on buttons in set_value

tryton/gui/window/view_form/view/form.py

@@ -84,6 +84,10 @@ class ViewForm(ParserView):
                     field = record.group.fields[name]
                     for widget in widgets:
                         widget.set_value(record, field)
+        # The states of group must be restored as some widgets could call
+        # display in set_value
+        for button in self.buttons:
+            button.state_set(record)
 
     def sel_ids_get(self):
         if self.screen.current_record: