Use unique ID

Problem/Motivation

The ID of the autocomplete is based on the facet ID, this can cause problems if the same facet is placed multiple times in the same page.
The ID should be unique to avoid conflicts.

Steps to reproduce

Proposed resolution

We could use Html::getUniqueId() for this.

It could also help with 🐛 drupalSettings are never removed after AJAX request Active (because getUniqueId() returns a random unique ID in AJAX requests).

Remaining tasks

User interface changes

API changes

Data model changes