message: clang compile fix - missing override specifier
diff: @@ -59,7 +59,7 @@ public:
  return (RDTreeWidgetItem *)idx.internalPointer();
  }
  - void sort(int column, Qt::SortOrder order = Qt::AscendingOrder)
  + void sort(int column, Qt::SortOrder order = Qt::AscendingOrder) override
  {
  emit beginResetModel();
  widget->m_root->sort(column, order);
  