Quassel client cannot unset both identity SSL key and certificate
Currently, the client supports setting both a SSL key and certificate with each identity. Unfortunately, it is impossible to remove both of them.
Opening the configuration dialog for identities, under the Advanced tab, presents Clear buttons for both key and certificate if both are set. Clicking the Clear button for either activates the Apply button for the Configuration dialog, while clicking both of them disables it again. Closing the dialog after clicking both of them has the effect of doing nothing. Clearing only one and closing the dialog clears the one, but then reopening and attempting to clear the other does nothing.