Add support for Miro v6.x. Fix watch video detection.

Signed-off-by: Raymond Wagner <rwagner@mythtv.org>
(cherry picked from commit ad8bfd5439d37dc8a3d9c1cfe1e2db901b8b309f)
Fix Dvr::GetFilteredRecordedList() to return entries when no count is
given.  Previously, if filters were given without a count limit, no
entries would ever be returned.

(cherry picked from commit 712a0c224084298a3a55eb6c658f194917e3138b)