Hi Kaze, These "hidden" class is not only "hide" the element, it changes display to none so no space is consumed by each button.

These three bottons shall be in the same position (top left) and in order to not change the building block for this, I considered that a simple CSS class for this exception could be nice.

If you consider that it's a better way to manage this I'll be happy hear it from you. I'm not a UI expert :p