Save / restore state in diff editor when reloading

Task-number: QTCREATORBUG-12650
Change-Id: I0bb25ed39f8a15dd5da798ebf0ce72898a2e3b3d
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/diffeditor/diffeditorcontroller.cpp

@@ -272,4 +272,14 @@ void DiffEditorController::requestChunkActions(QMenu *menu,
     emit chunkActionsRequested(menu, diffFileIndex, chunkIndex);
 }
 
+void DiffEditorController::requestSaveState()
+{
+    emit saveStateRequested();
+}
+
+void DiffEditorController::requestRestoreState()
+{
+    emit restoreStateRequested();
+}
+
 } // namespace DiffEditor