message: Make old trigger properties invsible
diff: @@ -351,11 +351,16 @@ export class SurveyTriggerCopyValue extends SurveyTrigger {
  }
  Serializer.addClass("trigger", [
  - { name: "operator", default: "equal" },
  - "value",
  + { name: "operator", default: "equal", visible: false },
  + { name: "value", visible: false },
  "expression:condition"
  ]);
  -Serializer.addClass("surveytrigger", ["name"], null, "trigger");
  +Serializer.addClass(
  + "surveytrigger",
  + [{ name: "name", visible: false }],
  + null,
  + "trigger"
  +);
  Serializer.addClass(
  "visibletrigger",
  ["pages", "questions"],
  