It is impossible to change the maskType property choices property

[andrewtelnov]

choices function for maskType property should return mask types.
It would allow to customize choices for the property grid in the way we used to:
Survey.Serializer.findProperty("text", "maskType").setChoices(["none", "pattern", "numeric"], undefined);
The code can be the following:

choces: (obj) => {
 const res = ["none"];
  Serializer.getChildrenClasses("masksettings").forEach(cl => res.push(res.name));
 return res;
}