Update display of no length

VocaluxeLib/Menu/SongMenu/CSongMenuFramework.cs

@@ -523,6 +523,7 @@ namespace VocaluxeLib.Menu.SongMenu
                 if (song == null)
                     return;
 
+                //TODO: Using prescan here causes Vocaluxe to hang a bit on loading the song but we need the length below
                 int stream = CBase.Sound.Load(Path.Combine(song.Folder, song.MP3FileName), true, true);
 
                 float startposition = song.Preview.StartTime;

VocaluxeLib/Menu/SongMenu/CSongMenuTileBoard.cs

@@ -137,7 +137,7 @@ namespace VocaluxeLib.Menu.SongMenu
                     _Tiles[i].Selected = _Locked == i + _Offset;
             }
 
-            if (_Length < 0 && CBase.Sound.GetLength(_PreviewSongStream) > 0 && CBase.Songs.IsInCategory())
+            if (_Length < 0 && CBase.Songs.IsInCategory() && CBase.Sound.GetLength(_PreviewSongStream) > 0)
                 _UpdateLength(CBase.Songs.GetVisibleSong(_PreviewId));
         }
 
@@ -215,6 +215,8 @@ namespace VocaluxeLib.Menu.SongMenu
                 _SongLength.Text = min.ToString("00") + ":" + sec.ToString("00");
                 _Length = time;
             }
+            else
+                _SongLength.Text = "...";
         }
 
         public override void OnShow()