Correct prod pw/allow adding multiple db tracks

app/musicmuster.py

@@ -934,6 +934,8 @@ class DbDialog(QDialog):
         # Add to playlist on screen
         self.parent().visible_playlist_tab().insert_track(
             self.session, track)
+        # Commit session to get correct row numbers if more tracks added
+        self.session.commit()
         # Select search text to make it easier for next search
         self.select_searchtext()