How can we improve WHMCS?

Bring back the option to change a ticket from registered customer to unregistered one
Hi, This functionality was part of the system until recently... I used to use it in order to see the customer email address.Let's say I get a mail from an unregistered client - I can see in the ticket the email address the ticket was opened from (see Capture.PNG) - but after connecting the ticket to a registered customer this email address is replaced with the customer name (with a link to the customer profile) - there is no way to see the original mail sender (email address or sender).Until recently I could revert the ticket to an unregistered client - and the original sender and email address was available again in the ticket.The way to revert the ticket to an unregistered client was by changing the option tab in the ticket system - I could add customer number 0 and the ticket was revert to unregistered customer, but now with the new way to connect a ticket to a customer (typing the name) I can't find a way to do it.see Capture (11).PNG with the new way to connect a ticket to a customer and see Capture2.PNG with the old way of doing it (replacing the client ID to 0 was the way to convert the ticket to an unregistered client).Please add such an option back to the system.Thanks!Ram