videolibrary: align available sort methods

As @zag2me has reported, depending on how you enter the list of all movie titles there are different sort methods available. This is because of the use of both videodb://movies/titles and library://video/movies/titles which result in a different viewstate object being used. This commit aligns the available sort methods for movies, tvshows, episodes and musicvideos for these cases so that the views don't appear to be different (which they definitely shouldn't).