Do not draw a rubber band and hilight feature if not necessary

src/app/qgsmaptoolchangelabelproperties.cpp

@@ -71,6 +71,12 @@ void QgsMapToolChangeLabelProperties::canvasPressEvent( QgsMapMouseEvent *e )
     QgsPalIndexes indexes;
     bool newAuxiliaryLayer = createAuxiliaryFields( indexes );
 
+    if ( !newAuxiliaryLayer && !mCurrentLabel.layer->auxiliaryLayer() )
+    {
+      deleteRubberBands();
+      return;
+    }
+
     // in case of a new auxiliary layer, a dialog window is displayed and the
     // canvas release event is lost.
     if ( newAuxiliaryLayer )