Improved error messages when offline

[Madis0]

If the user asks MultiMC to run offline, so should do packwiz - ignore the pack updates and the Java url-not-found errors.

[comp500]

I'm not sure if I can detect whether MultiMC is running offline or not... I'll have a look but it might not be possible.

[comp500]

I don't think there's any way of implementing this with the way packwiz-installer runs in MultiMC, unfortunately.

[Madis0]

You still could rephrase and reduce the errors. If one of the errors is due to not finding a server, just tell the user they might be offline.

[comp500]

Yeah sure, that sounds like a good idea.