Implement Multiples Tracks on the Schedule

Today in our backend we already have the Tracks implemented, but in the Frontend didint. This is directly related with the Schedule page.

By default we already have a single track, this issue asks for a interface to implement:

1. Using a modal to create new tracks
2. On the Create Schedule, allow to drag proposals to this tracks
3. On the Schedule Detail show all the tracks side-by-side