xbmc movies: play library item

Movie-play (from modal popup) starts library item and not the direct
file on disk. Instead of starting the actual file, the movie is
started. This enables the 'play now' to display the correct details.
Now shows movie title instead of file name
Xbmc Episode library play & now-playing layout

Play episode from library, not from directly by file. Plays a file from
the library so the now-playing label is set correctly.

Layout changes in the now-playing bar. Added subtitle containing show
title, episode/season, year.

Hide thumbnail on phones. On small screens, space is valuable. A lot of
movies/shows have long titles messing up the title of the play-now bar.