Property dim doesn't work properly on Windows

Using a menu like in the Gallery example for quick controls 2, we can obtain a menu than can be closed by tapping outside his content area.
The point is that by default if you tap outside the menu but match a button or other component that receives touch events, this is triggered and not think it's always the option you want in that situation.
To fix that I combine the modal and dim properties (modal: true; dim: false), avoinding capturing click/touch events while the popup is closing, and removing the popup background that is not necessary for a menu.
The property dim work well in linux an android, but in windows the background is shown.
This is an example code, and I attach too