update playlist's timer while scrolling with fancy_scrolling disabled

not updating it caused highlight to be disabled
during scrolling if key was being held long enough.

src/playlist.h

@@ -40,6 +40,7 @@ class Playlist : public Screen<Window>
 		
 		virtual void EnterPressed();
 		virtual void SpacePressed();
+		virtual void ReadKey(int &);
 		virtual void MouseButtonPressed(MEVENT);
 		virtual bool isTabbable() { return true; }