Added return tracks list to track list

[arsdev2]

Added return tracks to general tracks list to be able to do something with return tracks. Did not find better way to do it.

[ideoforms]

Thanks for the PR @arsdev2. I'm keen to find a way to handle return tracks in a way that isn't dependent on the number of tracks in the set. There's a conversation here discussing different approaches to restructuring the namespace; feel free to add your comments if interested!

Will close this PR in the meantime, and hope to implement a proper solution before too long. Thanks again.