GridView - How to implement copy functionality in Batch Edit mode

This example demonstrates how to add copied values to a new row on a custom command button click using a new client-side API implemented in the following threads:
ASPxGridView - Batch Edit mode - Provide a client-side API to obtain/modify cell values without entering edit mode 
ASPxGridView - Batch Edit mode - Provide client-side events that allow responding to entering and leaving the edit mode

WebForms version:
T114985: ASPxGridView - How to implement copy functionality in Batch Edit mode