Add grouping below rows

[GoogleCodeExporter]

It would be nice to be able to add the row group below the corresponding rows.

Example:

========================
| Type    |   Count    |
========================
|   Apple |      3     |
|   Orange|      7     |
------------------------
| Fruit   |     10     |  <-- First group row
========================
|   Carrot|      2     |
|   Leek  |      4     |
------------------------
| Veggie  |      6     |  <-- Second group row
========================

Original issue reported on code.google.com by jerimiah...@gmail.com on 26 Sep 2012 at 4:10