Summary:
This particular combination of features is not built out - data will be
censored but changes to data will not. So the user will now get an error
if they try to do it. Existing rules of this kind will continue to
operate as before, and can be set via the api.
Test Plan: added test
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2751