Spreadsheet view and AMR datasets
Spreadsheet view does not support selection for AMR datasets correctly.
select all cell array, apply
show split view and show the "Volume Data" in spreadsheet view
change Attribute in spreadsheet to show cell data.
issue 1: the view shows "Block Number" which doesn't make much sense for AMR datasets. It should be a (level, index) pair.
- issue 2: click on any row to select it, it flickers and doesn't stay selected. one should be able to select cells by clicking on them in the spreadsheet view.