Add sort order and filtering options to watch app

### What problem does this address?

On the watch app, it can be difficult to find the podcast/episode you want, especially if it is the last podcast in the list.

### What is your proposed solution?

It would be good to add some sorting and filtering options to the various list screens (podcasts, episodes, downloads, filters, files).

### Did you search for existing feature suggestions?

- [X] I have searched for existing feature suggestions.

Start by reviewing the watch app's podcasts, episodes, downloads, filters, and files list screens named in the issue. Determine which sorting and filtering options are appropriate for each screen and how they should be presented. Done means the relevant lists support agreed options and the behavior is covered by the project's existing checks.

Written by the indexing model from the issue text.