Fix adding track to header row

app/playlists.py

@@ -1235,6 +1235,11 @@ class PlaylistTab(QTableWidget):
             plr = session.get(PlaylistRows, self._get_playlistrow_id(row))
             plr.track_id = track.id
             session.commit()
+
+            # Reset row span
+            for column in range(len(columns)):
+                self.setSpan(row, column, 1, 1)
+
             # Update attributes of row
             self.item(row, USERDATA).setData(self.ROW_TRACK_ID, track.id)
             self.item(row, START_GAP).setText(str(track.start_gap))
@@ -1245,9 +1250,6 @@ class PlaylistTab(QTableWidget):
             last_played_str = get_relative_date(last_playtime)
             self.item(row, LASTPLAYED).setText(last_played_str)
 
-            # Reset row span
-            self.setSpan(row, 1, 1, 1)
-
             self.update_display(session)
 
     def _calculate_end_time(self, start: Optional[datetime],