The most stupid thing is that you cannot configure wireless connections if your wireless is disabled. And if you enable wireless then you will be affected by your broken configuration...
Fortunately, old good nm-connection-editor works as expected. So, all you need is to kick off the idiotic network stuff from gnome-shell and start old good Network Manager Applet:
mv /usr/share/gnome-shell/js/ui/status/network.js \
and restart gnome-shell (command 'r').