Batch applying Usage Rights does not apply the corresponding fields

Hi,

Minor. Close at will!
1. Upload at least two pics
2. Set the Usage rights to one of them to e.g. Screengrab, fill Source (that automatically goes to the Credit field).
3. Batch apply these rights

Actual:
The Screengrab is batch-applied, but not the Credit field derived from Source part of Screengrab UR

Expected:
Credit field is batch applied too.

Regards
Mateusz

Start by reproducing the batch-apply flow with two images, setting Screengrab and a Source value on one image. Trace the usage-rights handling to find where the derived Credit field is omitted. Done means batch applying the rights also copies the Credit value, with coverage for the reported scenario.

Written by the indexing model from the issue text.