// BH 2018.04.18 comment: addNotify() is not appropriate here. We

// BH 2018.04.18 comment: addNotify() is not appropriate here. We
    // are not changing ancestors, and keyboard action listeners do
    // not need to be reset. addNotify() is a very expensive operation,
    // requiring a full re-layout of all parents and children.
    // Note in JComponent:
    // This method is called by the toolkit internally and should
    // not be called directly by programs.
    // I note that addNotify() is called in several areas of Jalview.