What the regex does is it matches everything except alphanumeric and [_()[] -], excluding EOL since regex101 seems to also match it, and we probably don't want that to happen.
This regressed in #20714. One usage of `getSizeFor(0)` was replaced by
`adjustSize(GetSize())`, but another usage of `getSizeFor(Combo.Value)`
was replaced by `adjustSize(Combo.Value)`, which is not correct, since
`adjustSize()` is expecting to receive a combo-based size, rather than a
combo value directly.