namespaced attributes cannot be defined in prop-based commands

[KaruroChori]

Most prop based command have the structure s:cmd.SUBCMD.destattr. So scoping with . is allowed, but namespaces cannot be easily integrated.
This can be solved by adding for each command the additional subcommand ns. Verbose but better then nothing I guess, and considering namespaced attributes are very, very rare the tradeoff is acceptable.