ROENROLL-1462 adds header 3-dot menu on mobile

src/app/app.component.html

src/app/app.component.scss

src/app/core/header/header.component.html

src/app/core/header/header.component.scss

src/app/core/header/header.component.ts

src/app/core/navigation/navigation.component.html

src/app/degree-planner/degree-planner.component.html

src/app/degree-planner/degree-planner.component.scss

...-planner/sidenav-menu-item/sidenav-menu-item.component.ts