[tinycloud] Consider "accessible" when USB-ethernet is connected

[arthurlutz]

When using the clockworkpi "offline" without a wifi connection, I think tinycloud could (should?) display instructions when the clockworkpi has been connected using USB ethernet.

Existing :

• Keep clockworkpi not connected to wifi (airplaine mode or just don't configure wifi)
• Open tinycloud
• "Please connect to a wifi network" is displayed
• USB-ethernet information is displayed with IP address
• Connect it with usb cable
• From computer tinycloud functionnality is usable (scp, ssh, smb, etc.)

Wished :

• Keep clockworkpi not connected to wifi (airplaine mode or just don't configure wifi)
• Open tinycloud
• "Please connect to wifi or USB" is displayed (the IP for USB-ethernet is set but not useful so far, don't display it)
• Connect USB cable
• DHCP lease is detected on USB-ethernet
• Display full information (except wifi address)

[arthurlutz]

Taking a look at the code, I think the change required is

launcher/Menu/GameShell/98_TinyCloud/__init__.py

Line 190 in e22a328

if is_wifi_connected_now():

I might do a contribution on this if this is approved.