Fix bug storing open tabs

app/models.py

@@ -201,10 +201,11 @@ class Playlists(dbtables.PlaylistsTable):
             update(Playlists).where((Playlists.id.in_(playlist_ids))).values(tab=None)
         )
 
-    def close(self) -> None:
+    def close(self, session: Session) -> None:
         """Mark playlist as unloaded"""
 
         self.open = False
+        session.commit()
 
     @classmethod
     def create_playlist_from_template(

app/musicmuster.py

@@ -496,7 +496,6 @@ class Window(QMainWindow, Ui_MainWindow):
                     if playlist:
                         log.debug(f"Set {playlist=} tab to {idx=}")
                         playlist.tab = idx
-                        session.flush()
 
                 # Save current tab
                 record = settings["active_tab"]
@@ -533,7 +532,7 @@ class Window(QMainWindow, Ui_MainWindow):
         with db.Session() as session:
             playlist = session.get(Playlists, closing_tab_playlist_id)
             if playlist:
-                playlist.close()
+                playlist.close(session)
 
         # Close playlist and remove tab
         self.tabPlaylist.widget(tab_index).close()