Show next set of access key shortcuts immediately

When a menu is opened with the keyboard, the choices for the next menu keys should be shown immediately. For example, when you press Alt+H, you should see the choices for next keys you can press. Currently, you don't see anything.

There is a workaround. If you press Alt+H and then press Alt again, you see the next key choices. The extra key press shouldn't be necessary. If the user presses Alt+H, he's going to want to press another key to do something next. Immediately showing the next menu choices goes way back. It's in the Office Ribbon, It's in the standard Windows pull-down menu. It was in pull-down menus in DOS apps like Quick Basic in the 1980s. I image if you dug out a old copy of Lotus 1-2-3, and pressed "/" (it's menu key), it would show you what you could type next there, too. :-)

Device and Application Information:

• OS Build: 10.0.17763.0
• Architecture: X64
• Application Version: 10.1812.10048.0

Start by reproducing the Alt+H sequence in the Calculator application on the reported Windows build, then compare it with pressing Alt again. Trace the keyboard access-key handling and menu display entry points involved. Done means the next available menu keys appear immediately after Alt+H without the extra Alt press, while normal menu navigation still works.