Add WireGuard config field for interface name
Fixes BUG: 412795 BUG: 479179
Previously the WireGuard configuration took the connection name as the interface name. This had a host of problems, especially that the default connection name was not valid for an interface name, and that an invalid interface name would result in losing all of your changes.
This commit adds a required "Interface name" field (with proper validation). This behavior mirrors nm-connection-editor.
Edited by Stephen Robinson