* Simplify Header rendering, remove the use of react-slot-fill
* Remove the useless "/analytics" route
* Move all the <Header> renders to the new, declarative way of specifying breadcrumbs
* Re-render the Layout when a report is added using the REPORTS_FILTER, since that affects the breadcrumbs output
* Fix the base breadcrumb link and breadcrumbs on embedded pages
* Expanded Layout.propTypes to specify the breadcrumbs' shape
* Add initial transient notices component
* Animate notices to slide in and out
* Add notices to wc-api
* Map notices from wc-api to transient notices
* Add success message on settings save
* Add save notices to Settings page
* Remove all margin and padding from notice box when empty
* Add role alert to transient notices
* Add prefers reduced motion media query for transient animation
* Remove initial test notice
* Remove notices from wc-api
* Add wc-admin store for transient notices
* Pull transient notices from newly implemented store
* Use speak instead of role alert for accessibility
* Only show success message after request is complete
* Destructure state in componentDidUpdate
* Add store notice tests and fixtures
* Add box shadow to transient notice
* Move transient notices to bottom left
* Fix indentation
* Move non-reset SCSS to a new file
* Split shared files and “meta” files into two folders
This also creates two new base scss files for the different app vs embedded CSS files
* Move notice & embed-specific css out of reset
* Update README with folder structure notes
* Makes the header/sidebar component embeddable on other WooCommerce pages.
* Some mobile CSS fixes to make sure the header bar displays properly on smaller screensizes.
* Refactor notices and pull out success message from the panel
* Handle positioning of screen options, update message handling, css fixes and header height increase to match mockups, some code cleanup
* Only enable the header embed on normal/classic WooCommerce pages, and provide a method for plugins to opt-in.
This change also builds nicer breadcrumbs for pages.
* Code cleanup and consistent naming.
* Some spacing cleanup. Also updated the page title method to correctly set page titles in PHP for classic WC pages