When duplicated, a Rating Scale question applies the Dropdown display mode on the design surface

[JaneSjs]

Update "renderAs" property doesn't changed correctly based on "displayMode" property in survey-core package.

T16687 - Rating: does not display stars https://surveyjs.answerdesk.io/internal/ticket/details/T16687

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• [ ] If you change a Rating scale's displayMode to dropdown, it won't be updated immediately in design mode.

• [ ] If you copy a Rating scale which has the displayMode: "dropdown", a newly added question is rendered as dropdown.

The resultant survey JSON:

{
 "pages": [
  {
   "name": "page1",
   "elements": [
    {
     "type": "rating",
     "name": "question1",
     "displayMode": "dropdown"
    },
    {
     "type": "rating",
     "name": "question2",
     "renderAs": "dropdown",
     "autoGenerate": false,
     "rateValues": [
      1,
      2,
      3,
      4,
      5
     ],
     "displayMode": "dropdown"
    }
   ]
  }
 ]
}