Automatically break grab from other items when a dialog is shown

While user is interacting with something, like dragging an item or using items such as Flickable or Slider and some popup dialog opens (modal or not), those items are still keeping the grab and are getting the input.

This could be a problem for example if the dialog opens in front of a Slider, so the user could still change its value without knowing while still holding the screen.

Currently it could be worked around by disabling whole contentItem of the window, but this wouldn't work for multiple dialogs and also changes the appearance.

For example:

import QtQuick 2.15
import QtQuick.Window 2.15
import QtQuick.Controls 2.15

ApplicationWindow {
    visible: true
    width: 640
    height: 480
    Slider {
        onValueChanged: if (value > 0.5) d.open()
    }
    Dialog {
        id: d
        modal: true
        Text {
            text: "hello"
        }
    }
}