MAS: Add a Watched field to WebMovieBasic
(cherry picked from commit d505c7015f8613183c670c949734a044914fd04d)
MovingPictures: Don't use the watched_history table

The table doesn't seem to exist in all databases. Furthermore, each time data
is inserted in it, the user_movie_settings table is also updated, so reading
only that one should be enough.
(cherry picked from commit 0ffb2d6ed6483533e84fcf1e46b91dffe37b6634)
Merge branch 'release-0.5-watched-movie' into release-0.5