Backdrop port (Linked Field)

I think I'm far enough for an initial release. Work will continue here: https://github.com/backdrop-contrib/linked_field

Thanks for porting it to Backdrop. Sorry, but I don't think any of the maintainers uses it. Not that we could stop you since it is GPL code, but you're free to keep it alive.

Automatically closed - issue fixed for 2 weeks with no activity.