Non-native FileDialog loses URL schema when filename is manually entered

The example below is for Windows, but it also reproduces on macOS and Linux
 

Code

import QtQuick.Controls.Basic
import QtQuick.Dialogs

ApplicationWindow {
    width: 800
    height: 600
    visible: true

    header: Button {
        text: "Open Dialog"
        onClicked: dlg.open()
    }

    FileDialog {
        id: dlg
        options: FileDialog.DontUseNativeDialog
        fileMode: FileDialog.SaveFile
        selectedFile: Qt.url("file:///C:/Test/hello.txt")
        onAccepted: console.log("Accepted", selectedFile)
    }

    footer: Label { text: dlg.selectedFile }
}

Steps to reproduce

1. Create the folder, "C:\Test"
2. Run the code above
3. Click "Open Dialog"
4. Click "Save" (or "Open" in Qt 6.5.3, due to QTBUG-105080 )
5. Click "Open Dialog"
6. In the text field, replace "hello.txt" with "world.txt"
7. Click "Save" (or "Open" in Qt 6.5.3, due to QTBUG-105080 )
    

Expected outcomes (Native dialog)

• Step #4: Console prints "Accepted file:///C:/Test/hello.txt"
• Step #7: Console prints "Accepted file:///C:/Test/world.txt"
   

Actual outcomes (Non-native dialog)

• Step #4: Console prints "Accepted file:///C:/Test/hello.txt"
• Step #7: Console prints "Accepted /C:/Test/world.txt"

Fix
The culprit seems to be at https://github.com/qt/qtdeclarative/blob/v6.6.1/src/quickdialogs/quickdialogsquickimpl/qquickfiledialogimpl.cpp#L472: QUrl(currentFolder.path() + ...) does not contain the scheme.

A more robust setter would be

QUrl newSelectedFile;
newSelectedFile.setScheme(currentFolder.scheme());
newSelectedFile.setPath(currentFolder.path() + u'/' + newFileName);
setSelectedFile(newSelectedFile);