Show layouts used in workflows in "Used in" column

In Settings > Account > Custom Layouts, there is a "used in" column that displays which workspace(s) use the custom layout.

However layouts can be overwritten by a layout used at the workflow status level.

Therefore, some custom layouts will have nothing listed in the "used in" column, even though the layout is used in a workflow status.

It would be better to show all workspaces where this layout is used - regardless of whether it is configured as the workspace default or in a particular status.