Fix Artitst List Loading on rotation

[klnusbaum]

When rotating the phone into landscape mode while looking at the artist list, the loader animation just keeps spinning. It should instead just finish loading like it normally does in portrait mode.

Steps to reproduce:

1. Start with player in portrait mode.
2. Join a player.
3. Swipe over to the Artists View.
4. Wait for artist list to finish loading.
5. Rotate phone into landscape mode.