On a common controls label, setting alignVertical to bottom causes this code generation (and error and error about auto undefined):
NSB.addProperties(MenuLogoutContainer);
NSB.bs.addProperties(MenuLogoutImage, 'Image_bs4');
MenuLogoutLabel.style.lineHeight=auto*2-16-2;
NSB.addProperties(MenuLogoutLabel);
NSB.addProperties.addChild(LoginContainer);