feat: make wifi connections global by default
This change simply alters how a connection is created so that it doesn't specify that it is restricted to a user, and will therefore allow the connection to activate for any user -- including before login.
Benefits:
- Wifi can be active before login for enterprise / government use cases
- Connection doesn't have to be made for each user on a shared machine
- KISS can set up the wifi during the out of box experience
The connection config is still stored at
/etc/NetworkManager/system-connections and still requires root access
to view or modify.
cc @ngraham
Obsoletes kiss!43
Resolves kde-linux/kde-linux#236 (closed)
Resolves kiss#13