WIP: Most of menubar

src/components/button/button.css

src/components/button/button.jsx

src/components/language-selector/dropdown-caret.svg

src/components/language-selector/language-icon.svg

src/components/language-selector/language-selector.css

src/components/language-selector/language-selector.jsx

src/components/menu-bar/icon--mystuff.png

src/components/menu-bar/icon--profile.png

src/components/menu-bar/icon--see-community.svg

src/components/menu-bar/menu-bar.css

src/components/menu-bar/menu-bar.jsx

src/css/colors.css