App Sections need a second level

In an App, one can create a section and under that section have several reports. However, there is no second level section. In other words in would be nice to have "sub sections" and organize reports by different areas in a section. For instance, in our company we would like to have something like:

Operations (section)

     Drilling (second level section)

         Report 1

         Report 2

         ... 

         Report n

     Accounting (second level section)

         Report 1

         Report 2

         ... 

         Report n

Planning (Section)

       USA Planning (second level section)

         Report 1

         Report 2

         ... 

         Report n

      Europe Planning (second level section)

         Report 1

         Report 2

         ... 

         Report n

That way it is much easier to organize our Apps.