Change: Reload song from disk only at game mode normal

This should fix issues while song reloading at short and medley game modes. In my opinion testing song txt file changes are in almost all cases only useful at normal game mode, so this change could be the final workaround. For checking different medley values in the txt file (MEDLEYSTARTBEAT / MEDLEYENDBEAT) you still have to restart the game.

Vocaluxe/Screens/CScreenSing.cs

@@ -1094,7 +1094,7 @@ namespace Vocaluxe.Screens
                 return;
             }
 
-            if (!_Sso.Selection.PartyMode)
+            if (!_Sso.Selection.PartyMode && CGame.GameMode == EGameMode.TR_GAMEMODE_NORMAL)
                 song.ReloadSong(reloadNotes);
             
             string songname = song.Artist + " - " + song.Title;