Add a way to save a multiblock into a parallel XML based format if all the leafs are of the same type.
It is currently not possible to create a distributed XML file (eg. pvtp) using Paraview without running ParaView in parallel and distributing the data.
It would be nice to be able to group dataset of the same type together using GroupDatasets filter then save the data as a pvt* (eg pvtp) file that will be produce a distributed dataset.