pabx manager | suggest test when setting conf values

[rslemer]

I suggest system make a test when user setting pabx setting ( like as smtp outgoing server )

I means, when I setting SMTP outgoing server, system sent a email for certify configuration is right, and working as well

I think is the better practice, same process when user setting SoftPhone Server Settings too ( like as capture any log, or make a test call )