simplify RealSpace (3D) view - simplify disconnection

GUI/View/Realspace/RealSpaceCanvas.cpp

@@ -180,13 +180,6 @@ void RealSpaceCanvas::setConnected(SampleModel* model, bool makeConnected)
             model, &SampleModel::modelAboutToBeReset, this, [&]() { m_currentItem = nullptr; },
             Qt::UniqueConnection);
 
-    } else {
-        disconnect(model, &SampleModel::rowsInserted, this, &RealSpaceCanvas::updateScene);
-        disconnect(model, &SampleModel::rowsRemoved, this, &RealSpaceCanvas::updateScene);
-        disconnect(model, &SampleModel::rowsAboutToBeRemoved, this,
-                   &RealSpaceCanvas::onRowsAboutToBeRemoved);
-        disconnect(model, &SampleModel::nonPositionRelatedDataChanged, this,
-                   &RealSpaceCanvas::updateScene);
-        disconnect(model, &SampleModel::modelReset, this, &RealSpaceCanvas::resetScene);
-    }
+    } else
+        model->disconnect(this);
 }