message: Set property type "question" to some trigger's properties
diff: @@ -379,7 +379,11 @@ Serializer.addClass(
  );
  Serializer.addClass(
  "setvaluetrigger",
  - ["!setToName", "setValue", "isVariable:boolean"],
  + [
  + { name: "!setToName:question" },
  + "setValue",
  + { name: "isVariable:boolean", visible: false }
  + ],
  function() {
  return new SurveyTriggerSetValue();
  },
  @@ -387,7 +391,7 @@ Serializer.addClass(
  );
  Serializer.addClass(
  "copyvaluetrigger",
  - ["!setToName", "!fromName"],
  + [{ name: "!setToName:question" }, { name: "!fromName:question" }],
  function() {
  return new SurveyTriggerCopyValue();
  },
  @@ -395,7 +399,7 @@ Serializer.addClass(
  );
  Serializer.addClass(
  "skiptrigger",
  - ["!gotoName"],
  + [{ name: "!gotoName:question" }],
  function() {
  return new SurveyTriggerSkip();
  },
  @@ -403,7 +407,7 @@ Serializer.addClass(
  );
  Serializer.addClass(
  "runexpressiontrigger",
  - ["setToName", "runExpression:expression"],
  + [{ name: "setToName:question" }, "runExpression:expression"],
  function() {
  return new SurveyTriggerRunExpression();
  },
  