Librespot: "auto" not available as volume normalization mode

Hi! Just a minor feature request. Modern versions of librespot supports a mode “auto” in addition to “Track” and “Album” for volume normalization. In fact it is the default. Currently we can choose between “Off”, “Album” and “Track” in Ropieee XL, but there is no “auto” option. The auto option makes librespot switch between track normalization for playlists and album normalization for albums automatically, which also mirrors how the offical spotify client does things. Do you think it would be possible to add this value to the list of normalization modes?

Thank you for your effort with Ropieee by the way. XL is perfect for my use case, well deserving a donation or two!