Fix emusic connector
Fix emusic connector

Use proper track art selector.
Use selectors instead of function.

alexesprit/web-scrobbler,david-sabata/web-scrobbler,galeksandrp/web-scrobbler,fakelbst/Chrome-Last.fm-Scrobbler,david-sabata/web-scrobbler,inverse/web-scrobbler,alexesprit/web-scrobbler,galeksandrp/web-scrobbler,fakelbst/Chrome-Last.fm-Scrobbler,inverse/web-scrobbler,carpet-berlin/web-scrobbler,carpet-berlin/web-scrobbler