Added unique names on playlist rename.

wobuzz/player/playlist.py

@@ -124,6 +124,8 @@ class Playlist:
         wbz.close()
 
     def delete(self):
+        self.app.utils.unique_names.pop(self.title) # remove from unique names so a new playlist can have the old name
+
         path = f"{self.app.settings.library_path}/playlists/{self.title.replace(" ", "_")}.wbz.m3u"
 
         if os.path.exists(path):