In list by source TOC, include feature datasets as a nesting level

[wayfaringrob]

Right now if you have feature classes that live inside a feature dataset in your map, the TOC does not reflect this. It shows the .gdb as the overarching container and displays the feature classes as if they live right inside the .gdb. This is misleading; the tree should reflect the actual lineage of the feature classes.

[M_Bowser]

Displaying feature datasets in the table of contents data sources tab (and listing the layers that are sourced from each) in ArcMap was very useful.   This is missing from Pro, which requires you to go into the layer properties to determine this.  Is there a reason for this missing functionality or an oversight?  Would love to see this in a future version.

ArcMap:

ArcGIS Pro: (note there are 3 different feature datasets sourcing these layers)