Correct prod pw/allow adding multiple db tracks

app/music.py

@@ -104,6 +104,9 @@ class Music:
         with lock:
             DEBUG("music.get_position", True)
 
+            print(f"get_position, {self.player=}")
+            if not self.player:
+                return
             return self.player.get_position()
 
     def play(self, path):

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()