Add savedDataField attribute to form field definition

Description

Adding `savedDataField` as an attribute to a form field definition would allow that field to be pre-filled from a different field in the savedData for the record.

For example, you might have two mutually-exclusive controls that store their value in the same field. In this example, either `page` or `link` are stored in `item_id`, and the following code would repopulate those controls from the `item_id` data:

Assignee

Seb Duggan

Reporter

Seb Duggan

Labels

None

Accepted

Yes

Fix versions

Priority

Medium
Configure