Previously, with settings of Security=SSL and authentication=certificate,
attempting to change Security=None would (of course) be blocked. So
Security would remain SSL. But the authentication options would then
include "Password, transmitted insecurely", whereas the option should
have remained as "Normal password" (because the security remained SSL).
The problem could have been fixed with a simple shuffling in
updatePortFromSecurityType() so that updateAuthPlainTextFromSecurityType()
was invoked before mPortView.setText(), but the logic for requiring that
ordering was not plain to see. (Although no longer necessary, the
shuffling was done as well.)