I have 3 entities: client <- interest <- call -> client
On Call creation from Interest I need to fill reference to client with default value equal to interest refference to client.

In other words: need to auto-populate other fields, which are common for entities.

Todo:
1. Make a checkbox "Auto-populate other fields in entities" in widget settings form.
2. In field widget form, if reference is in query string - load that entity and fill other fields of new entity with same values.