Selection Tooltips don't work with PartitionedDataSetCollection

• open exodus file with IOSS reader and then use Hover Cells On to show cell tooltips as the mouse hovers over cells. As you move the cursor, you'll get following errors:

( 158.602s) [paraview        ]vtkMultiBlockDataSet.cx:78     ERR| vtkMultiBlockDataSet (0x55a7242e49c0): vtkPartitionedDataSetCollection cannot be added as a block.