Fix compile, and apply review comment
Fixed greater vs more typo.
getCellname is back to a string view.
Because in most cases was used as a strong not a refId.
and there was a fundamental issue with region names used as a cellname
`ciCompareLen(a, b, b.size()) == 0` expression is an equivalent of checking for
equality of `a` prefix with size `b.size()` with `b`.
`ciCompareLen(a, b, a.size()) == 0` is also the same thing but `a` is a prefix
`b` should start with.
