UI: 43155, fix tooltip issue for toggle buttons.

[lukastocker]

https://mantis.ilias.de/view.php?id=43155

NOTE:
The extra

container around label and button is corrupting the handling of core.Tooltip.js..
The JS adds another class to the parent div of the element (here: button). Therefore the new class was added to

instead of

. See following:

Regular and working:
<div class="c-tooltip__container">
	<button>...</button>
	<div class="c-tooltip c-tooltip--hidden"></div>
</div>


(Old) case and not working:
<div class="c-tooltip__container">
	<div class="il-toggle-item">
		<label>...</label>
		<button>...</button>
	<div>
	<div class="c-tooltip c-tooltip--hidden"></div>
</div>```