[mythtv] Updated DVD navigation fixes.

[Greg Estabrooks]

> title.  There are a lot of DVDs where the "Movie" starts out with a
> whole bunch of single-chapter 15 second titles at the front of the
> movie.  Most of these short titles are things like FBI warnings.  It
> is very annoying to have to sit through theses, especially when there

 I Hate these. In fact both of my "real" DVD players allow me to use next 
chapter to skip to the next. I assumed that was normally how most DVD players
handled it :)