Add the ability to mark shows as watched without adding a date

Trakt Feature Requests
19

Theres at least five threads about this already. This was the reply from Justin.

Related:

https://forums.trakt.tv/t/just-mark-as-watched/17842
https://forums.trakt.tv/t/watched-state-without-date-info/3238
https://forums.trakt.tv/t/trakt-backlogged-shows/2379
https://forums.trakt.tv/t/unknown-play-date/5564

Oh wait this was not a new thread haha.