Dynamic Matrix with Expandable Detail Sections - Hide the "Show Detail" button when a detail section contains no visible elements

[JaneSjs]

T20970 - Add visibility condition for matrixdynamic detail panel
https://surveyjs.answerdesk.io/internal/ticket/details/T20970

The Show/Hide detail button may be unnecessary when the detail section is empty and contains no visible elements.

{
  "pages": [
    {
      "name": "page1",
      "elements": [
        {
          "type": "matrixdynamic",
          "name": "question1",
          "columns": [
            {
              "name": "Column 1"
            },
            {
              "name": "showDetailFields",
              "cellType": "boolean",
              "defaultValueExpression": "true"
            }
          ],
          "detailElements": [
            {
              "type": "text",
              "name": "question2",
              "visibleIf": "{row.showDetailFields} = true"
            }
          ],
          "detailPanelMode": "underRow",
          "choices": [
            1,
            2,
            3,
            4,
            5
          ]
        }
      ]
    }
  ]
}