LogOut when WiFi disconnected

[ylogx]

Awesome feature suggestion by a user.
Logout when user disconnects WiFi

Note: Merely sending request is not enough.

Possible issues:

• Unable to send request since WiFi disconnected instantly. (Although we don't need to check the status but at the very least make sure that request is sent)
• We may make the WiFi stop stopping before sending our request (i.e stop the halting sequence), but that might cause huge delays during Wifi swithch off event which is undesirable.