ui.menu blur event ui item returns null

[Andrea Fercia]

Looking at the docs, they state the ui.menu blur event passes the event itself and a ui object containing the currently active menu item. See ​https://api.jqueryui.com/menu/#event-blur By the way, the code actually returns null for the ui.item. Seems either the docs, but more likely the null value is wrong. I can understand why the active menu item is set to null but maybe the event should be triggered before? FWIW noticed this while working on a new core feature for WordPress 4.5, see ​https://core.trac.wordpress.org/attachment/ticket/33301/33301.voiceover.diff where we used a workaround. Any feedback more than welcome, thanks! :)

[Scott González]

Yeah, this is a bug in the code. And a pretty obvious bug looking at the code :-/

[Scott González]

In 57f801f:

Menu: Don't reset active element until after triggering blur event

This ensures that ui.item actually exists in the blur event.

Fixes #14945
Closes gh-1696