In comparison to the original nouislider.js file I modified nouislider.js:1007 by adding span inside tooltips for styling
nouislider.css might need some refactoring
This commit fixes #3990.
update to noUiSlider v9, added support for vertical slider
@acburst @Dogfalo Please look into it and do the needful
Fixed up a bit of the CSS and made the coding style consistent. Rebased and merged 7992168