On the Windows client, the "Help" menu is not accessible by keyboard. This is because both the "History" and the "Help" menu have the same accelerator letter "H" assigned, so Alt+H opens the "History" menu (presumably because it comes first). Furthermore, the menu bar doesn't follow the normal Windows UI convention that you can toggle keyboard focus from/to the menu bar by presing just the Alt key, and that you can navigate between menus using the left/right arrow keys when keyboard focus is on the menu or menu bar, thereby preventing the other way the "Help" menu could be accessed using the keyboard.

Original request: https://github.com/mattermost/desktop/issues/804