New App Navigation Pane - Put a section within a section

The ability to put a section underneath a section in the new Power BI App navigation pane. An example of what I mean is as follows:

-> Marketing Reports

->2019

->Report 1

->Report 2

->2018

->Report 1

->Report 2

->2017

->Report 1

->Report 2



-> Management Reports

->2019

->Report 1

->Report 2

->2018

->Report 1

->Report 2

->2017

->Report 1

->Report 2

When you first open the app, you would only see two sections "Marketing Reports" and "Management Reports" and then once you expand each of those sections, you would only see the years. Then you could subsequently expand each year to show the reports. This would be an extremely beneficial feature to better organize information in applications.