* 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
* Add CSS naming conventions following Gutenberg’s standards
* Update `woo-dashboard` to `woocommerce-layout`
* Update admin notice container to new classname standard
* Refactor dashboard layout into new Layout components
* Style the new layout
* Use Slot/Fill for the Header component
* Center cards, fixed size for sidebar
* Only set the box-sizing on things within our app
* Make app the full height of the wp-admin frame
* Add styles to show/hide sidebar
* Toggle the sidebar
* Wrap router around entire Layout, use page setting to show/hide sidebar on page
* Fix the styles on show/hide buttons, add title & close button to the sidebar
* Use a min-height on visible sidebars
* Add/update READMEs
* Update space between main content & sidebar
Justin Shreve
Kelly Dwan