Show tracks

[patrickwalls]

Tracks are subsets of courses in a particular math subject. There should be a dropdown menu or a legend listing the tracks. A track should show in a different color when the user selects it so that all the courses and prerequisites are shown.

[LeoLee5566]

working on it

[LeoLee5566]

see https://codepen.io/leolee5566-the-vuer/pen/mdOVYwX