Clicking a button, a panel with the lyrics of the playing track is shown for dockremoteclient

When the button is clicked, a module should search on several lyrics website for the current track. If the search result is plausible, show it (in a separate window)

Show the cover of the now playing track for dockremoteclient

When the track changes, a module will download the cover of the current track and show it (next to the title/album/artist label)