[Cubicweb] Modification of attributes of entities already in the scheme

[Stéphane Bugat]

> This is because RichString is a kind of "virtual" attribute, which
> will actually ends up in
> two attributes, e.g. description and description_format. So you
> should remove both (though
> removing description_format may be enough for your case).

And it definitely works... What would I do without you, Sylvain?
Thanks a lot.