Deck editor: skip unnecessary card name comparison when no search term is defined

cockatrice/src/carddatabasemodel.cpp

@@ -123,6 +123,8 @@ bool CardDatabaseDisplayModel::lessThan(const QModelIndex &left, const QModelInd
     QString leftString = sourceModel()->data(left).toString();
     QString rightString = sourceModel()->data(right).toString();
 
+    if (!cardName.isEmpty())
+    {
         if (leftString.compare(cardName, Qt::CaseInsensitive) == 0) {// exact match should be at top
             return true;
         }
@@ -137,7 +139,7 @@ bool CardDatabaseDisplayModel::lessThan(const QModelIndex &left, const QModelInd
             return true;
         if (isRightType2 && !isLeftType2)
             return false;
-
+    }
     return QString::localeAwareCompare(leftString, rightString) < 0;
 
 }