<!-- The following is part of our issue template, feel free to remove this if it doesn't apply --> ### Issue description - version 4.8.0 - components: Dropdown Dropdown items are not selectable by using arrow keys, which is [supported by default by bootstrap v4 beta](https://getbootstrap.com/docs/4.0/components/dropdowns/). Also closing the dropdown with the ESC key is not working, contrary to bootstrap default.
Issue description
Dropdown items are not selectable by using arrow keys, which is supported by default by bootstrap v4 beta.
Also closing the dropdown with the ESC key is not working, contrary to bootstrap default.