The Transkribus import can skip a folder when a different folder's name contains its name

Found while troubleshooting #175 (closed). When a folder already appears to be imported, it is entirely skipped. I didn't want to wait for the RQ worker to clean up the folder to restart the import to try a dumb workaround, so I just tried to rename the folder, but it didn't work. The code that checks for an existing folder relies on the name filter of ListElements, which is not name = 'thing' but LOWER(name) LIKE LOWER('%thing%').

Let's say you have a Transkribus project, and the folders in it are named like so:

• Something
• Thing
• Some

The only folder that will be imported is Something, and the other folders will be skipped, because Something contains both Thing and Some (case-insensitive).

The Transkribus import should instead iterate over .paginate('ListElements', ...) and look for any result whose name matches exactly the folder's name.