Fix disconnect wifi

[halyssonJr]

Summary

I created an app to test the WiFi connection, but when F7 disconnected to the Access Point the variable Is Connected still was true even after receiving the NetworkDisconnected event.

Meadow StdOut: Try connecting ...
Meadow StdOut: Try connecting ...
Meadow StdOut: Connected :) | 0
Meadow StdOut: Connected :) | 1
Meadow StdOut: WiFi connected.
Meadow StdOut: Connected :) | 2
Meadow StdOut: Connected :) | 3
Meadow StdOut: Connected :) | 4
...
Meadow StdOut: Connected :) | 20
Meadow StdOut: WiFi disconnected.
Meadow StdOut: Connected :) | 0
Meadow StdOut: Connected :) | 1
Meadow StdOut: Connected :) | 2
Meadow StdOut: Connected :) | 3
Meadow StdOut: Connected :) | 4
...