Applying styles to disabled menu items in Perspective's Menu Tree component

In the Menu Tree component of Perspective, disabled menu items look identical to the enabled ones.
I would like to give users a clear visual indication that some options are unavailable.
To achieve this, I defined a style called "StyleA" with an element state "disabled," which sets the color to red (additionally, I defined an "enabled" state that applies a green color, just as a double check).

On the page, I have two text fields—one enabled and one disabled—both using StyleA.
On these two components the style is working perfectly, as you can see below.

I also have a Menu Tree where the itemStyle property is set to StyleA.
Despite the second menu item being disabled, the style does not apply.

Any suggestions?

I just tried it out on my own Designer and got the same results. I tried using the class on the individual item objects and the itemStyle property, but neither seemed to work.

It's not as clean of a solution as this would be, but you could add the style rules like a different background color, setting the cursor to not-allowed, etc. to the Basic rules of a style class. Then you can dynamically add and remove that class from the individual menu items when needed via property bindings or event scripts.