[DeckEditor] Fix undo/redo clearing legality (#6675)

libcockatrice_models/libcockatrice/models/deck_list/deck_list_model.cpp

@@ -85,6 +85,8 @@ void DeckListModel::rebuildTree()
     }
 
     endResetModel();
+
+    refreshCardFormatLegalities();
 }
 
 int DeckListModel::rowCount(const QModelIndex &parent) const
@@ -649,7 +651,6 @@ void DeckListModel::setDeckList(const QSharedPointer<DeckList> &_deck)
         deckList = _deck;
     }
     rebuildTree();
-    refreshCardFormatLegalities();
     emit deckReplaced();
 }