MouseArea::hoverEnabled property unexpectedly propagated to child Controls.

When nesting a Control inside a MouseArea, the Control's hoverEnabled property is, I believe, erroneously disabled, while by default it should be enabled due to the style hints.

Window {
  visible: true
  MouseArea {
    anchors.fill: parent
    ComboBox {
      id: control
      model: ["broken1", "broken2", "broken3"]
    }
  }
  ComboBox {
    id: ctrl2
    y: 30
    model: ["working1", "working2", "working3"]
  }
}

In this example, hover events are not delivered to the top most combobox. Setting either the MouseArea's hoverEnabled, or the ComboBox's hoverEnabled to true works around the problem.

For reasons beyond my understanding, QQuickControl::calcHoverEnabled() reads the unrelated hoverEnabled property from QQuickMouseArea.

The doc says that Control::hoverEnabled is only propagated when set on a Control. MouseArea is not a Control.