playlist: Rework playlist modified detection and dirplay

The modified state is now an explicit flag that has to be
set whenever a user-triggered modification occurs. This is
recorded in the control file to ensure it doesn't get lost
after resume. There may be some places I missed where the
modified flag should be set/cleared, but it seems to work
well enough right now.

Change-Id: I3bdba358fc495b4ca84e389ac6e7bcbef820c219

1 files changed, 1 insertions, 0 deletions

diff --git a/apps/onplay.c b/apps/onplay.c
index 5f8af77fca..4157544d28 100644
--- a/apps/onplay.c
+++ b/apps/onplay.c
@@ -358,6 +358,7 @@ static int add_to_playlist(void* arg)
         onplay_result = ONPLAY_START_PLAY;
     }
 
+    playlist_set_modified(NULL, true);
     return false;
 }