TextEdit does not calculate the implicitWidth in a designer use case

A TextEdit which has no width but was quested for the implicitWidth and got then a text does never recalculate with or implicitWidth. This resulted in a 0 sized TextEdit inside the QtQuickDesigner.

• simple example

  import QtQuick 2.6
  import QtQuick.Window 2.2
  
  Window {
      visible: true
      width: 640
      height: 100
      title: qsTr("Hello World")
      property Item sizedRect
      Rectangle {
          id: rect
          anchors.fill: parent
          Component.onCompleted: {
              var myComponent = Qt.createComponent("TestText.qml")
              var textEdit = myComponent.createObject(rect)
              textEdit.text = "short"
              print(textEdit.implicitWidth)
              print("################")
              textEdit.text = "in contrast to short this is long"
              print(textEdit.implicitWidth)
              print(textEdit.width)
              textEdit.text = "and this not that long"
              print(textEdit.implicitWidth)
              print(textEdit.width)
              sizedRect = textEdit
          }
  
      }
      Column {
          y: 50
          Rectangle {
              color: "red"
              height: 10
              width: sizedRect.width
          }
          Rectangle {
              color: "blue"
              height: 10
              width: sizedRect.implicitWidth
          }
      }
  }
  

• output:

  qml: 25
  qml: ################
  qml: 25
  qml: 25
  qml: 25
  qml: 25