[Android][Podcasts] Downloading a podcast should keep you where you are

[ashleytwo]

At the moment (at least on Android) if you've scrolled down a list of podcast episodes and click to download one it then immediately takes you to the top of the list again. 

On the flip side it would be nice to have a 'back to top' button because scrolling through a podcast with lots of episodes is a pain, but that shouldn't be the default behaviour after downloading an episode.