Browser window freezes when trying to upload large datasets.

[harrykeightley]

Trying to upload the timit dataset through the datasets flow causes the browser to freeze up. Because we check to make sure all the files are in the right formats and paired properly, I think we keep them in memory...

We could try and just flat out remove mismatched/incorrect files on the server side and just have the user upload the files directly.

[benfoley]

At that scale of files, no user in their right mind is going to be sorting through files anyway. Let's go with taking all files that user uploads, and discarding anything that doesn't match. Can we still show a list of matching file names in a way that doesn't require the files to be held in memory?