Saving repo configuration downloads large amount of snapshots

[jpds]

I had to reinstall this app and upon saving my S3 configuration - a large amount of data was downloaded in order to display the available snapshots in the repo in the next view.

If the app is closed whilst this process is happening - then the entire thing has to be repeated.

It's probably better if there was a way to save the configuration and asynchronously load the snapshots in the background.