Since we're touching the CSS file, it'd be good to refactor some of the selectors with performance in mind.

1. use child selectors instead of descendant selectors:
https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Writing_efficient_CSS#Avoid_the_descendant_selector.21
2. I think the selectors we now have are overqualified, I think all those `div`-s and `span`-s could be removed since we're using classes 

To conclude, I think this rule could be written as `.touchLibDoubleSlider > .sliderButton`

Perhaps it would be required to do some minor tweaks in the generated HTML, since the output is sth like
`<div><span> <span></span> </span></div>`, but anyway it's worth doing it probably.