Feature Request: Update Listbuilder Control

[dleffler]

One of the issues with the Listbuilder control are that you can't sort the items in the list once you move them over. Primarily this is due to the standard behavior of an HTML scrolling list. However, we could correct this using the SortableJS plugin as we do in the WYSIWYG Form Designer.

Programming notes:

• Should we 'keep' the 'Filter' feature?
• Should we 'keep' the 'Move All'/'Remove All' button feature?
• How should the behavior stay the same or change?
  • Standard behavior adds item or removes an item from the 'Selected' list with a click
  • Sortable behavior requires drag/drop into/out-of list(s)
• How should we handle the non-list Items (ad-hoc list)
  • Currently the arrows adds what's in the text box to the list or removes the item from the list

[dleffler]

Have the sorting feature implemented within the BS4/BS5 listbuilder control from a recent upload and code found online