Spotify brings Playlist Folders to mobile devices, which will help users organise their music on their handsets and make it a lot simpler. The folders that could only be used on desktops before are now live on mobile devices. So, now you can tidy up your music library on the go, no laptop required. You can group playlists by mood, genre, activity—whatever you want. Whether you need a set for workouts, road trips, or just chilling at home, findin…