Put the re-indenting into the active undo-group.

src/plugins/qmldesigner/core/model/modeltotextmerger.cpp

@@ -272,10 +272,10 @@ void ModelToTextMerger::applyChanges()
         qDeleteAll(m_rewriteActions);
         m_rewriteActions.clear();
 
-        textModifier->commitGroup();
-
         reindent(positionRecalculator.dirtyAreas());
 
+        textModifier->commitGroup();
+
         textModifier->reactivateChangeSignals();
     } catch (Exception &e) {
         m_rewriterView->enterErrorState(e.description());