copied plaintext attribution lacks URLs

[FDMS]

When using the "Copy credit as text" button, I'd expect to get a plaintext string that I can also paste to places where inserting labelled links through the clipboard might not be supported (social media platforms, …).

Current string example:

“Hello World” by ImagineCup is licensed under CC BY 2.0

Expected string example:

“Hello World” ([URL]) by ImagineCup ([URL]) is licensed under CC BY 2.0 ([URL (always required)])