Re: [css-containment] Splitting the "sizing" part from "layout" containment

I think it's good to keep it as a single property, I just wonder if the
term "strict" implies that it should include "size" as well as the other
three. Not that I can think of a better keyword, but it's not strict if the
size is implicit. It feels like "all" might be a softer way to imply
"layout", "paint", and "style", with perhaps "strict" meaning all four.
Either way I can make it work, it just didn't feel like "strict" meant
"strict" if it only meant 3/4.