Menu: Click at the beginning or the end of the disabled menu item does not close the menu

[RandomNonameDude]

Reproduction

Reproducible right in the documentation in Menu with icons example

Steps to reproduce:

1. Open a menu with disabled item and click at the edge of such item (green areas in the attached picture)
2. See that the menu doesn't close

Expected Behavior

When one clicks at the edge of disabled menu item, the menu should close same as it closes when one clicks in the middle of disabled menu item.

Actual Behavior

The menu doesn't close when someone clicks at the edge of disabled menu item

Environment

• Angular: 8
• CDK/Material: 8
• Browser(s): tested on Chrome
• Operating System (e.g. Windows, macOS, Ubuntu): tested on Win10

[Totati]

It will close when you exactly click on text or icon. Above, below, between won't close it either.

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