Add new "List View" Widget along with marrying an item name to a subitem column

For reporting purposes, our company would like to be able to generate a list of tasks that were completed. However, our tasks lie at the subitem level. This makes it challenging to cleanly display results.

Feature Requests:

  1. Add column to subitems that is the name of the main item. If main item is “Item 1”, all subitems for that item would have a column with the value “Item 1”
  2. Create a “List View” widget, allowing you to list all of these subitems and to be able to filter, sort and hide columns.

The image I attached shows examples of what I’m looking to achieve. Until this can be accommodated, I may have to Export to Excel and write vba that removes the main items, filters and sorts.