v3.8.7 – Card picker previews & cleanup

Fixes & Improvements

• Static previews for Volume, Source, Bass, Treble sub-cards in the HA card picker (no more empty previews)
• Removed audac-mtx-more-info from card picker — it is a more-info panel, not a standalone card (setConfig is not a function error)
• Fixed crash in MoreInfo _getZones() where this._config.title was referenced but _config does not exist
• README: Linked Audac to audac.eu