Fix ListItemIcon listeners

[skjnldsv]

Needed to make sure the events listeners we apply to the parent are forwarded

You can test on the docs, on master, adding a @click= does not work.
Here, it does :)

<template>
	<ListItemIcon title="User 1" @click="alert" />
</template>

<script>
export default {
	methods: {
		alert() {
			alert(...arguments)
		}
	}
}
</script>

[skjnldsv]

/backport to stable3