Function commitEdit

pj_plotting/widget/src/TabbedPlotWidget.cpp:198–209

 private slots:
  void commitEdit() {
    if (!edit_active_) {
      return;
    }
    edit_active_ = false;
    const QString new_text = edit_->text();
    label_->setText(new_text);
    edit_->hide();
    label_->show();
    setFocus(Qt::OtherFocusReason);
    emit renameCommitted(new_text);
  }

  void cancelEdit() {
    if (!edit_active_) {