Qt Quick: Can't use "Select" mode in Debugger when root item is a Window

1. Create a Qt Quick UI project with a very simple QML file:

   import QtQuick 2.1
   import QtQuick.Window 2.0
   
   Window {
       visible: true
       width: 360
       height: 360
   }
   

2. Start debugging this.
3. In Debug mode, try to start the "Select" feature by clicking the small arrow icon:
   
   You can't, it's disabled.
4. Replace the Window item with a Rectangle item.
5. Repeat steps 2 and 3.
   Now you can use the "Select" feature.

"Select" should work with all items.