Fix the column selection mechanism of the TransposeTable filter.

As ParaView (and pqTreeView) sort table columns in alphabetical
order, it is important that selected columns are added in the
sub table used for transposition with their original order in
the input table and not according the alphabetical order.

Change-Id: I714657d255340ce0d4c0bd6dc7520fec3e4e9dfa
Merge topic 'fix-pv-transposetable-filter' into next

59929d1a Fix the column selection mechanism of the TransposeTable filter.