Improve performance when a large number of episodes are on screen

[madeofpendletonwool]

Performance currently when there are many episodes are on screen currently is fine in most cases. There are a few actions that force the app to re-loop through each episode again though. For example, clicking the see more button to check a description. This forces the app to reload the component that loads in the episode. Meaning if there are many episodes on screen this can cause a bit of slow down.