Fix possible crashes and glitches when playing song previews (#898)

* Add AutoplayPending

* Add locks

* Add Base Update

* Add Base Update

* Add locks

VocaluxeLib/Menu/SongMenu/CSongMenuTileBoard.cs

@@ -220,6 +220,8 @@ namespace VocaluxeLib.Menu.SongMenu
 
         public override void Update(SScreenSongOptions songOptions)
         {
+            base.Update(songOptions);
+            
             if (songOptions.Selection.RandomOnly)
             {
                 _PreviewSelectedSong();
@@ -783,4 +785,4 @@ namespace VocaluxeLib.Menu.SongMenu
             Init();
         }
     }
-}
+}