BROKEN: Trying ot improve things and borokne animation during debugging
DONE: Adaptive animation Duration .
DONE: Totally unfolded elements are not reacting to clicks anymore (capture click and perform event.stopPropagation.
WIP: again does not work: \n for data-value and html tags in case of data-value-html.
User needs to supply always data-value (without html tags, eventually with \n symbol), and optionally data-value-html variant that maybe be used after animation finishes.