* Add updated versions of sr-only and not-sr-only mixins
* Improve element stacking in modals on tablet and mobile
* Add comment suggestion
* Change sr-only for screen-reader-only which is more descriptive
In order to ease the identification of private packages within the monorepo, this adds an `internal-` prefix to all of the current private packages. This makes it immediately clear when reviewing `packages/js` what is and isn't a private package.