FR: add 3rd option to show all "live" and "scheduled" livestreams

[Marzal]

Related to #1215, it would be a nice addition to be able to list ALL livestream, given that https://podverse.fm/es/livestreams defaults to "Live" and there is plenty of room for more.

[mitchdowney]

This would be nice to add. I'm thinking maybe instead of a Live/Scheduled dropdown selector, we just add two list views stacked on top of each other, one for listing the currently Live shows, and one for listing the upcoming Scheduled shows, with their own independent pagination controls. Each list could have a header "Live" and "Scheduled" at the top of it.

That said, with my current priorities, I don't have time to work on this in the near future, so I will unassign myself from it. This might be a good task for a new contributor I think, since it is mainly rearranging the existing functionality and components.