Added a check to loading_thread() that makes sure that the playlist isn't already loaded. (And probably fixed some bugs without knowing it.)

wobuzz/player/playlist.py

@@ -78,6 +78,9 @@ class Playlist:
         loading_thread.start()
 
     def loading_thread(self):
+        if self.loaded:
+            return
+
         if self.load_from is None:  # if the playlist is in the library
             self.load_from_wbz(self.path)
 
@@ -313,4 +316,3 @@ class Playlist:
 
         if len(self.tracks) > 1:
             return self.tracks[-2]
-