Components (button, slider, picklist) ought to have a 'hide' boolean attribute, which is missing/null/false by default, and if set to true, the component does not display. (Or - it might display, but have vertical height zero? Animation to show / hide it?)
Components (button, slider, picklist) ought to have a 'hide' boolean attribute, which is missing/null/false by default, and if set to true, the component does not display. (Or - it might display, but have vertical height zero? Animation to show / hide it?)