* Prevent select label/value breaking in two lines
* Make sure frontend and base styles are loaded in the same order
* Use link-button mixin for address button
* Refactor shipping rates control CSS to decrease specificity and overwrites
* Refactor sidebar panel CSS to decrease specificity and overwrites
* Fix link-button vertical-align
* Persist previous shipping rates while loading
* Refactor ShippingRatesControl LoadingMask
* Show package name
* Simplify CSS to avoid using the adjacent selector
* Add comment to explain why 'selected' is hardcoded in the editor
* Rename package 'index' to 'key'
Albert Juhé Lluveras