| ⇢ | A | EnableHistoryViewerExtension added | |
| ⇢ | A | HistoryControllerFactory added | |
| A | ↛ | HistoryViewerController removed |
| ⇢ | A | HistoryControllerFactory::create() added | |
| ⇢ | A | EnableHistoryViewerExtension::updateIsEnabled() added | |
| ⇢ | A | HistoryControllerFactory::isEnabled() added | |
| C | ↛ | HistoryViewerController::getVersionForm() removed | |
| B | ↛ | HistoryViewerController::versionForm() removed | |
| A | ↛ | HistoryViewerController::schema() removed | |
| A | ↛ | HistoryViewerController::getClientConfig() removed |