* Replace :not(:disabled) styles
* Use var for style
* Update active styles
* Update disabled styles for <input> elements
* Update button disabled styles
* Add focus styles to checkbox
* Update style name
* Add card icon to audio menu items
* Update cache data format
* Create _getCacheItem
* Add _playAudioFromSource function
* Implement default card audio info
* Specify exact audio to download when an override is assigned
* Abstract using _getMenuItemSourceInfo
* Update downloadability check
* Update the main audio menu buttons to also assign the default source
