504 error may not be fatal

[qqmyers]

Seen at QDR - adding 200 files on our smallest test machine, the final addFiles call resulted in a 504 response from our proxy since Dataverse didn't respond before it's timeout. However, the /addFiles call did complete successfully and the files were uploaded. DvWebloader should not call this a failure in the UI - could possibly do a refresh to see if the dataset was updated/if the server is no longer giving 504s?

[qqmyers]

Not sure if this is a separate error yet, but manually clicking refresh dataset info after this failure does not show the uploaded files as not selected in the UI (by default, already uploaded files are not seelcted).