Only show each SSID once, and automatically pick the best (WLAN handovers)

[probono]

In public places, e.g., airports, hotels, train stations, there will be many access points with the same SSID.

As of hrev53259+3, Haiku shows each one separately, unlike any other OS I know.

It should only show each SSID once, and automatically pick the access point with strongest signal for that SSID. The client needs to select another, stronger access point with the same SSID (if available) if the current signal is getting too weak - so that it even works when moving around (WLAN handovers between access points).

[probono]

The same SSID shown multiple times

[andreibosco]

Still happens in beta 5 x86_64 (hrev57937+36).

[nephele]

Indeed, there was nothing changed in this code between beta4 and beta5 that would be relevant.