Feature Request: source-name field for csv updates and imports in web form

[jtgorman]

I've been working with another person to get an instance of AtoM spun up. They're migrating data from our old Archon instance.

We've got several different CSV files and with some experimentation with the command-line we have something to work around some other issues we were having. However, it seems like with the web interface the "source-name" is always the filename? It would be nice to be able to specify that. Right now to keep the source-name the same from what I'm following we'll need to do some renaming in order to do this. That is, rename file_level_1.csv to "mycollection", use the web interface. Then change file_level_2.csv to "mycollection"

I have to admit, there's a lot of documentation on the csv import, so I may have missed something.