Renames the dataset. Its cases and experiments follow through the foreign keys, so a rename keeps the history it already has.
Left out to keep the stored summary; sent as "" to clear it.
Left out to keep the dataset's columns as they are; sent to replace them wholesale.
The cases as they should stand afterwards: all of them, each carrying its id if the dataset already has it. Sent with the rest of an edit so that a rename the dataset refuses refuses the case edits with it.
eval dataset updated