Network Manager problem when changing WiFi connection in 17.04

[Chris Green]

Another problem with 17.04 that isn't in 16.04.

If you change the WiFi SSID you're connected to by simply clicking on
the new SSID then, in 17.04, Network Manager thrashes around for
several minutes and sometimes fails completely to reconnect.  If you
explicitly 'disconnect' from the first WiFi SSID and then click on the
new one it works perfectly OK.

This doesn't happen in 16.04.

(I'm actually running xubuntu 17.04 but I suspect this is an Ubuntu
rather than a specific xubuntu issue)

-- 
Chris Green