Fixes showing temporary files

src/plugins/texteditor/plaintexteditor.h

@@ -47,6 +47,7 @@ public:
     bool duplicateSupported() const { return true; }
     Core::IEditor *duplicate(QWidget *parent);
     const char *kind() const;
+    bool temporayEditor() const { return false; }
 private:
     QList<int> m_context;
 };