Listbox should have events for opened, closing

[DarkGhostHunter]

For example, we can use this to integrate popper.js.

<template>
   <Listbox ... @onOpened="integratePopper" @onClosed="removePopper">
       <ListboxOptions ref="listboxOptionsEl">
            ...
       </ListboxOptions>
   </Listbox>
</template>

<script setup>
import { createPopper } from '@popperjs/core'

const listboxOptionsEl = ref(null)

function integratePopper(event) {
    createPopper(event.target, listboxOptionsEl)
}
</script>

• onOpen = Before the ListboxOptions is mounted/shown.
• onOpened = After the ListboxOptions is mounted/shown.
• onClose = Before the ListboxOptions is unmounted/hidden.
• onClosed = After the ListboxOptions is unmounted/hidden.

[olivierpascal]

Yes, please add open/close events for components