TextEditor: Update circular clipboard on cut

Task-number: QTCREATORBUG-8713
Change-Id: Ic83c78a4caf7f768259c8f6830e7b81016c70e5e
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>
Reviewed-by: David Schulz <david.schulz@digia.com>

src/plugins/texteditor/basetexteditor.h

@@ -355,6 +355,7 @@ protected:
 private:
     void maybeSelectLine();
     void updateCannotDecodeInfo();
+    void collectToCircularClipboard();
 
 public:
     void duplicateFrom(BaseTextEditorWidget *editor);