replace private cards+solution

  • √Stop mentioning in documentation (done - private cards is now visible only to people with the Developer role.)
  • Code another way to restrict viewing of some cards to user.
    • Earlier, thought to document how to do this by creating a role, but this is only available to people with lots of permissions, and messy - many one-person Roles - and doesn't work for, e.g., the private profile use case.
  • In migration of release where private cards stop working, do one or more of these:
    • Warn in the upgrade notes of the change.
    • Code that warning to show up when the migration script is run, if there are any cards with permissions restricted to "Me".
    • Ideally, migrate existing private cards to the new method.