Manage SSL certificate needs improvements

So, Virtualmin allows you to create the csr for a new user which is great. So, it's a year from that date, and, the customer wants to get another cert since theirs is expiring. You can go to the signing request tab under Manage SSL Certificate, but the warning says that a key file already exists and it will be overwritten. That will break the current one while the customer awaits their new one.

It should be possible to create another CSR even while the current one is in place. Customers don't always use the same provider to renew, and, not all providers keep the csr on file either. Cusotmers often shop for the lowest price and change providers. So, this ends up generating a support ticket when the customer could have handled this on his own.