Display any warnings and disqualifications after import

[MichaelNMaggs]

As a coordinator setting up the first round of a new campaign, I have added jurors, made and pasted a gist, and attempted to start the first round. The round seems to be created correctly, but can't be activated on as it claims to have no uploaded images.

I've tried this several times, at different stages of our contest, and the error is repeatable. It means the coordinator has to seek organiser or perhaps maintainer assistance.

[MichaelNMaggs]

This is a separate issue from #106. For later rounds, adding images by URL is not provided as a possible option to coordinators. Here, a URL option is provided, but the images are not loaded. Also, once the round has been created with no images, the only option is to delete it entirely and start again: it's not possible to re-enter a URL and try again.

[slaporte]

I'm following up with @MichaelNMaggs via email on this particular case.

Two improvements that may help:

• If a juror provides a regular gist url, we should fetch the raw gist url automatically. We can do this seamlessly in the backend.
  • ✔️ Done with 878f59c
• @yarl We should display the warnings response during import. There's an outline of how this works in the doc. If entries are are disqualified, we should show the list.

[MichaelNMaggs]

Yes, those improvements would be excellent additions.

(@slaporte has helped me work around the issue for my current campaign)

[slaporte]

These warnings should also be logged.