initial css to accomodate the menu height variations

css/styles.css

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

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

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

.../04-components/menu/menu--horizontal/menu--horizontal.yml

...ce/_patterns/04-components/menu/menu--main/menu--main.yml

...ns/04-components/menu/menu--secondary/menu--secondary.yml

source/_patterns/04-components/menu/menu.twig