How to make Dialog fit it's contents?

[flashmozzg]

I have something like this:

Dialog {
        id: dialog
        title: qsTr("Choose someText")
        standardButtons: StandardButton.Ok | StandardButton.Cancel

        Row {
            id: row
            spacing: 5
            Label {text: qsTr("this is someText:");anchors.verticalCenter: tf.verticalCenter}
            TextField {
                id:tf
                text: someText
            }
            Label {text: "text2";anchors.verticalCenter: tf.verticalCenter}
        }
    }

But no matter what (changing spacing, commenting out labels), Dialog width always stays at 225 cutting part from leftmost label. In docs it said it should fit the content of it's content item but it doesn't! How to solve this? I don't want to recreate dialog with all of it's buttons and signals using window.
P.S. sort of unrelated question: is there a way to wait until dialog is closed? For example if I want to use value retrieved from dialoge in signal, I want to .open() dialog and wait until it closes to send signal. connecting to onAccepted() won't work because I don't want to send this signal every time this dialog closes, only after I open it from specific place.