sort order lost when updating patches

[Bjorn Helgaas]

This is on https://patchwork.ozlabs.org/project/linux-pci/list/.  I
don't see the Patchwork version anywhere, but it's the new stuff.

When I update a patch, e.g., to mark it superceded, the patch sort
order seems to revert back to date:

- Click on "Submitter" heading to sort by submitter so I can remove
superceded patches.
- Mark superceded patches, set "Change state:" to "Superceded", click "update".
- I'm returned to patches sorted by *date*, not by submitter.

This makes it a real pain to mark superceded patches.

Bjorn