[feat] Send an event or run a callback when a context menu is dismissed

[tauri-bot]

This issue has been upstreamed from tauri-apps/tauri#9138

Describe the problem

In tauri 2.0, I'm opening a context menu using the new window.popup_menu() API. I can respond to selections by listening to menu events. However, I would also like to know when the user exits the menu without picking any items.

Describe the solution you'd like

A MenuEvent sent to the existing handler would be fine - perhaps popup_menu() could take an id parameter? Alternatives include adding more functions, like popup_with_dismiss_callback().

Alternatives considered

No response

Additional context

The reason I want to know when the menu is dismissed is because when the context menu opens, I modify the UI to highlight the element that the user has clicked on - I want to remove that highlight when they stop viewing the menu, even if they didn't make a selection