- open the attached document
- press the button to execute the contained macro which opens a dialog
  demonstrating a few of capabilities of the UNO grid control
- sort the data in the control by clicking onto a column header
- append a new data row by clicking the "Append Row" button
=> note that the row is indeed appended, so that effectively, the data i
   not sorted anymore. In contradiction to this, the column header still
   claims the data is sorted.

Either the sort indicator should implicitly be removed upon appending new rows, or the new rows should be inserted to the right position within the other rows, respecting the current column sort.