Reload savefile from disk when loaded from folder

Folderlist stores savefile objects, can open A, edit A, open B, open A,
and all edits from prior are still there. Just re-open the save file
from disk. The folderlist already checks if the path exists prior to
calling it to reopen.

PKHeX.WinForms/MainWindow/Main.cs

@@ -395,7 +395,7 @@ private void MainMenuFolder(object sender, EventArgs e)
                 ofType.BringToFront();
             }
             else
-                new SAV_FolderList(s => OpenSAV(s, s.FilePath)).Show();
+                new SAV_FolderList(s => OpenSAV(SaveUtil.GetVariantSAV(s.FilePath), s.FilePath)).Show();
         }
 
         // Misc Options