BE: Item. Add new data element Administrative note (detailed view, edit mode)

Purpose:  Adding a new data element to the Item record, labelled Administrative note. The data element is to be implemented as a repeatable, not required data element. In the UI the data element will be implemented as a text area data element. 

Use case:

Stories:

1. Story
   • Login to FOLIO Snapshot as user diku_admin,
   • Go to the Inventory app, any Instance record with associated Holdings and Item data in detailed view mode
   • When drilling down to the Administrative data accordion
   • Then displayed after the Statistical code type and Statistical code data, here the new data element Administrative note is displayed.
2. Story
   • When in detailed view, and the data element Administrative note is repeated
   • Then the notes are listed below each other
3. Story
   • When in edit mode of the Item record
   • Then a button is displayed below the 'Add statistical code' button:
     • new button will look similar and have same behavior as the 'Add statistical code' button
     • the button is labelled Add administrative note
4. Story
   • When clicking the button Add administrative note
   • Then
     • an editable text area data element is displayed
     • the text area data element can be repeated
     • the text area data element can be deleted
       See UX mock up: