Use SortedKeyList with Track classes to automatically keep a list in order

[rlaphoenix]

Is your feature request related to a problem? Please describe. This will heavily simplify some operations in both the dl command and the user's service code. E.g., when you want to pre-filter by resolution, bitrate, e.t.c e.t.c.

Describe the solution you'd like It should implement it similar to how it was implemented for the Title classes.

Describe alternatives you've considered N/A

Additional context N/A

[rlaphoenix]

This was done with the new Chapters class, but needs to be done with Video, Audio, and Subtitles too.