The current implementation of the Native Menu component doesn't provide some configuration options that are available in the Kendo UI for Angular suite. 

Can you add the following configurations of the openOnClick property as it is available in the Angular suite? 

• "leave"—The items open on hover until either an item is selected, or the mouse pointer leaves the Menu and the predefined delay passes.
• "click"—The items open on hover but do not close when the mouse pointer leaves the Menu. To close the items and avoid opening the Menu on hover, the user has to click a random place on the page.

When working with the Native ContextMenu there is no event that can identify when we've left the submenus of the main popup of the component. 

If a mouseleave or similar event is added to the submenus of the ContextMenu, it will be useful to handle the user's interaction with the component.

It will be a very nice feature improvement for the Menu if we can add a custom class to the popup of each menu item. Such a feature will allow us to easily customize the look of the popup itself, edit its position, etc.

The popup class can be configured using a property like "popupClass" or something else.