Adding and deleting editable list items

How would I implement this?:

I have a list of text items. When the users clicks the Add button, a
new item is added to the end of the list, and is put into edit mode so
that the user can edit the text in place. When the user has finished
editing the new item, the new item is highlighted and has keyboard
focus.

It seems to me that the Data Presentation Widgets, although capable of
editing cells of existing lists, are not really designed for
applications that add and delete items on the fly. Is my assessment
correct? Must I write this list implementation from scratch?

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