QuickFix: Clean up RefactoringChanges and add missing functionality.

* Can change files without opening an editor.
* Can open an editor without changing a file.
* Default to reindenting new files.
* Allow reading a file temporarily to access document and text.

src/plugins/qmljseditor/qmljsrefactoringchanges.h

@@ -48,6 +48,9 @@ public:
 
     virtual QStringList apply();
 
+private:
+    virtual void indentSelection(const QTextCursor &selection) const;
+
 private:
     QmlJS::ModelManagerInterface *m_modelManager;
     QmlJS::Snapshot m_snapshot;