* Order summary: Add spacing between product name and price name
* Remove border from shipping options in the side bar
* Add a hasBorder prop to Panel
* Checkout Order summary: remove margin product description
* Fix padding when there are multiple packages and remove old code
* Simplify selector
* Add margin botton to no shipping options notice
* Make sure Checkout titles are aligned when there are no express payment methods
* Update step heading margins according to new designs
* Honor heading styles in Cart and Checkout blocks
* Replace Panel with DisclosureWidget and remove Card
* Remove panel-style from main entry
* Rename DisclosureWidget props
* Simplify TitleTag assign
* Add aria-expanded attribute
* Rename DisclosureWidget to Panel
* Make Panel button clickable area smaller
* Fix specificity issues with Twenty Twenty
* Reset italics in reset-typography mixin
* Make C&C titles font size large
* Add padding to shipping options when in the sidebar
* Use named font sizes instead of values in px
* Convert rem mixin to em
* Remove unnecessary line-height
* 'Design' -> 'layout'
* Add comment to magic line-heihgt number
* Update a couple of class names to use BEM
* Use consistent name for SCSS variables
* Fix order summary line heights
* Update docs/contributors/coding-guidelines.md
Co-authored-by: Mike Jolley <mike.jolley@me.com>
Co-authored-by: Mike Jolley <mike.jolley@me.com>