Sorting on a view with column pivots applied, should default to sorting on the row header value

[texodus]

Sorting on a view with column pivots applied currently results int eh data set having a 'sort' order applied to each relevent column in the resulting data set left-to-right. This allows the reuse of the un-sorted output, but causes ordering to be dependent on this column order, which is typically unexpected and should not be default.