Added tooltip based on:
https://vizhub.com/felipemaion/f63dcfb7d165497fa7d9b1a1ee8e7aa0?edit=files&file=index.html from Felip Maion
https://vizhub.com/adilzeshan/9f456efa51ae447c8ff891131c02422a?edit=files&file=index.html from Adil Zeshan
