Inheriting components don't have full access to the context of their parent in QT6 (I assume?)

The buttonRow in Dialog must be exposed through an alias now (buttonArea).

This fixes minimumHeight failing to evaluate buttonRow.height

CURA-8640

resources/qml/ColorDialog.qml

@@ -29,7 +29,7 @@ UM.Dialog
     // the size of the dialog ourselves.
     // Ugly workaround for windows having overlapping elements due to incorrect dialog width
     minimumWidth: content.width + (Qt.platform.os == "windows" ? 4 * margin : 2 * margin)
-    minimumHeight: content.height + buttonRow.height + (Qt.platform.os == "windows" ? 5 * margin : 3 * margin)
+    minimumHeight: content.height + buttonArea.height + (Qt.platform.os == "windows" ? 5 * margin : 3 * margin)
 
     property alias color: colorInput.text
     property var swatchColors: [