Quick Text: SVG inline images have poor quality on High-DPI displays

SVG used as inline image in Qt Quick Text control has bad quality on High DPI displays.
This is a case e.g. on macOS with Retina display or on Windows with screen scale factor more than 100%.

Currently the code in QQuickText doesn't take into account QWindow's effectiveDevicePixelRatio at all.

Sample code:
don't forget to use a screen with DPR > 1.0

import QtQuick
import QtQuick.Window

Window {
    visible: true

    Column {
        Text {
            text: '<img src="https://dev.w3.org/SVG/tools/svgweb/samples/svg-files/acid.svg" width="32" height="28""/>'
        }

        Image {
            width: 32
            height: 28
            source: 'https://dev.w3.org/SVG/tools/svgweb/samples/svg-files/acid.svg'
        }
    }
}

Actual result:  on Windows with DPR = 1.75

Expected result: top image should be the same quality as bottom one