MVP implementation for adding a warning when editing a reference
that's the extension of another. In the current approach we're
just using the elements .text() like we do when you create an
extended reference.
Bug: T247922
Change-Id: I2fc574152059937b4aa3fc25ee486d363cc809d5
Includes renaming the method so it's more clear what it's doing.
As preparation for adding the extends warning to the edit pane and
to allow easier identification of parts belonging to the edit
workflow.
Change-Id: If84c5dbdee19c0ebc0a28b50dda93fef3f558c6e
