Add "Retain All" for custom fields when Moving Issues

Please add a "Retain All" checkbox so that users can select to Retain All field values when moving issues.

When moving issues there is a "All" checkbox when selecting issues to take action on but there is not the same option for "Retain" when a user must select whether to Retain field values. If issues have a large number of fields then the use must click each checkbox (assuming they want to Retain all values). This takes up time and introduces the risk that the user might inadvertently neglect to select an option. This could result in data loss.