[mythtv] MythGame rescan drops favorites

[Greg Estabrooks]

> You can't simply add what's new and remove what's been deleted?

 Certainly I could, but was hoping to avoid any extra lookups and
or prompting of the user as much as possible. On small collections
It's not that bad, but if you have a lot of them (I have 24k of
entries in my DB at the moment, and yes there are people out there
with a heck of a lot more of them) then that can lead to a lot.
My goal is to automate the overall process and metadata gathering
as possible.


 But if it's the will of the people I will look at making it optional.