* follow up to #9104
* relates to #8790
* fix up styleguide example buttons for yes/no variants, add more disabled variants
* add type="button" to styleguide example buttons
* revert box-sizing change and use line-height with calc for borders instead
* revise border overrides to set border-color only
* fix modal button override
- formatting fix for the header on small devices
- ensure the padding left is not set so that the outside is fully clickable
- fixed close button colours
- fix alignment and heights of smaller breakpoint modal header
- fixes #9053
- fixes #9014