Additional css for mega menu tray at wider widths as well as the hamburger

css/styles.css

js/component_scripts.min.js

source/_patterns/03-layouts/header/_header.scss

source/_patterns/03-layouts/header/header.twig

...ce/_patterns/03-layouts/site-container/site-container.yml

...tterns/04-components/menu/menu--header/_menu--header.scss

...4-components/menu/menu--horizontal/_menu--horizontal.scss

...s/04-components/menu/menu--horizontal/menu--horizontal.js

...04-components/mobile-menu-button/_mobile-menu-button.scss

source/_patterns/04-components/mobile-menu/_mobile-menu.scss

source/_patterns/04-components/site-logo/_site-logo.scss