Save the playlist after editing fields of files in it - affects files that are not in the library.

src/playlist/playlist.cpp

@@ -1531,6 +1531,8 @@ void Playlist::ReloadItems(const QList<int>& rows) {
       emit dataChanged(index(row, 0), index(row, ColumnCount-1));
     }
   }
+
+  Save();
 }
 
 void Playlist::RateSong(const QModelIndex& index, double rating) {

src/ui/mainwindow.cpp

@@ -1435,6 +1435,8 @@ void MainWindow::EditTagDialogAccepted() {
 
   // This is really lame but we don't know what rows have changed
   ui_->playlist->view()->update();
+
+  playlists_->current()->Save();
 }
 
 void MainWindow::RenumberTracks() {