Add list ordering options

[neonrust]

Currently the listing is ordered by title (no case), but other sorting could be useful.

For example:

• earliest "next" episode
• release year
• date added (also same as index order)
• etc

And, of course, the reverse of all these should also be possible.

[neonrust]

Initial functionality added in 2b724b65b66bac0a2c5df7a71908e48aacbd49a9

[neonrust]

The sorting options mentioned in the issue description has been implemented.