Bring Filters and Sorting for Seasons into v3

These tools were there in v2, but aren't yet in v3.

Potential use cases are:

• Seeing the best and worst-rated seasons

• Seeing your personal most and least watched seasons (for shows such as The Clone Wars or any anthology show)

• Seeing the general most and least watched seasons

• Hide/fade rated and non-rated seasons to quickly see which seasons I have yet to rate

• Hide/fade watched/not watched to quickly see which seasons I've finished (particularly useful for shows without official order)