[4.0] Wrong aria-hidden value in menu with sub-items

[drmenzelit]

Steps to reproduce the issue

Create a menu with sub-items.
Create a menu module on the sidebar (standard layout). Set the parameter "Sub-menu Items" to "Show".
Inspect the code of the menu.

Expected result

The attribute "aria-hidden" should have the value "false"

Actual result

The attribute "aria-hidden" has the value "true" although the sub-menu is open and visible.

System information (as much as possible)

Additional comments

The Javascript controlling the menu should be checked.

[brianteeman]

#32068

[drmenzelit]

I knew we had it already :-)

Closing this because duplicate.