Package implementing the history system.
| HistoryCompleter | Module implementing a special completer for the history. | 
| HistoryDialog | Module implementing a dialog to manage history. | 
| HistoryFilterModel | Module implementing the history filter model. | 
| HistoryManager | Module implementing the history manager. | 
| HistoryMenu | Module implementing the history menu. | 
| HistoryModel | Module implementing the history model. | 
| HistoryTreeModel | Module implementing the history tree model. |