Obsolete authenthication requests for WiFi

When a WiFi connection behaves unstable over longer time (eg. long range), sometimes the user is asked for the password again (the requester come up already filled), even if it is correct. The request can come up at any time, depending on the connection quality, and likely force the user to look up the already correctly entered password again.

This is very annoying for kiosk-like systems or when using fullscreen apps.

This bug is stone old and iv'e seens this year by year over a broad range of Ubuntu versions as well devices (Intel and ARM platform). It still happens as of Ubuntu 16.04.

So I wonder if this is inevitable by the fact that NetworkManager sometimes can't decide between an authetication failed by wrong password vs. authentication failed by bad connection. If not, it should finally be fixed.

There may be a security problem, for locked down kiosk applications, as the password may be obtained by kiosk users if the request pops up.