Rename checkbox and immediately apply.
Added a checkbox in Location selection dialog (saved as user settings) to let user choose if variable is being renamed.
Also forced closing celle editor once new location is selected.

<?xml version='1.0' encoding='utf-8'?>
<ModbusServerNode xmlns:xsd="http://www.w3.org/2001/XMLSchema" Local_Port_Number="1502" Local_IP_Address="127.0.0.1"/>