Enhancement: detect and handle network issues

[ecanault]

Hi,

During internal testing, we simulated network issues (Wifi and Ethernet):

• Disconnection: remove the cable or shutting down the access point
• Unavailibility: shut down the Internet access while the network connection is still established with the Mac

Depending the method of deployment, the behaviour is not the same:

• Installomator: endless loop (or not...); the solution consists of quitting Setup Manager qui Cmd-Ctrl-Shift-E
• Policy: the item is ticked as correctly deployed (green checkmark) and obviously it's not the case

So it should be helpful to:

1. Detect and inform the user of network issues
2. Visually indicate (red cross?) what deployment tasks fail

Thanks, Emmanuel Canault

[scriptingosx]

https://github.com/Jamf-Concepts/Setup-Manager/issues/16