Better Import/Export Error Debug Logging
We often hit problems with the import export feature and a lot seems to stem from here:
The problem is the error messages are often cryptic like "Import/Export Error: invalid base64".
It'd be great if the error at least told us what it was attempting to iterate over. An ID or something else that would allow us to identify it in the exported project.json file would make debugging much faster.
cc/ @jramsay