Created by: MartijnCuppens
The tab fadeout doesn't work because the .show class isn't removed. This causes some lag before the new tab is faded in.
Current behaviour: https://getbootstrap.com/docs/4.1/components/navs/#javascript-behavior
Behaviour with fix: https://deploy-preview-27533--twbs-bootstrap4.netlify.com/docs/4.1/components/navs/#javascript-behavior Beautiful, isn't it?
Closes #26525 (closed)