(iOS) Cleaner Switching between casting and remote

It’s clunky to move from Plex casting to Plex remote when controlling a device from the iOS app. In the casting screen, a jump-back to Remote would make it less cumbersome to get back to “use my phone as a dumb remote.”

p.s. Having basic play/pause/skip functionality in the Remote would reduce the need to switch back and forth a lot.

2021 clean-up: implemented