- Use the password stored in the connection profile instead of asking
each time to the user
- `Disconnect` menu item wasn't shown even when connected
When entering the Wi-Fi menu first, `nmcli_connection_info` is called with
`NULL`. If we return `false` here, the menu doesn't show the `Disconnect`
menu item even when the wifi is on and connected.
- Don't consider wired connections when checking if the device is connected
`cmd_file = popen("nmcli -f NAME c show --active | tail -n+2", "r");`
That command returns all active connections, even the wired ones. That
means that if the wifi is not connected but we have a wired connection,
retroarch shows the Disconnect menu item to disconnect ... a
non-existent wifi connection.
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