Twenty Twenty (1.2) Horizontal menu - Submenu - #49950

[Rcreators]

abbing will open a sub-menu and the user can go through it. If the user presses the ESC key while the sub-menu is opened, it will close the submenu and the user can move to the next menu item. Also updated index.js as per slack discussion to make parent a focus when closing sub menu with esc.

Trac ticket: https://core.trac.wordpress.org/ticket/49950

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[joedolson]

A number of style issues; I suggest reviewing the JavaScript Coding Standards: https://developer.wordpress.org/coding-standards/wordpress-coding-standards/javascript/

But, more importantly, this doesn't work if there's more than one sub menu in the menu, so it'll a functional improvement there.

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A commit was made that fixes the Trac ticket referenced in the description of this pull request.

SVN changeset: 60040
commit: 19c08e3

This PR will be closed, but please confirm the accuracy of this and reopen if there is more work to be done.