added type doc to menu related files

.../admin-sidebar-section/admin-sidebar-section.component.ts

src/app/+admin/admin-sidebar/admin-sidebar.component.ts

...bar-section/expandable-admin-sidebar-section.component.ts

src/app/app.component.html

src/app/app.component.ts

...ble-navbar-section/expandable-navbar-section.component.ts

src/app/navbar/navbar-section/navbar-section.component.ts

src/app/navbar/navbar.component.ts

src/app/navbar/navbar.effects.ts

src/app/shared/menu/initial-menus-state.ts

src/app/shared/menu/menu-item.decorator.ts

src/app/shared/menu/menu-item/link-menu-item.component.html

src/app/shared/menu/menu-item/link-menu-item.component.ts

src/app/shared/menu/menu-item/models/altmetric.model.ts

src/app/shared/menu/menu-item/models/link.model.ts

src/app/shared/menu/menu-item/models/menu-item.model.ts

src/app/shared/menu/menu-item/models/search.model.ts

src/app/shared/menu/menu-item/models/text.model.ts

src/app/shared/menu/menu-item/text-menu-item.component.html

src/app/shared/menu/menu-item/text-menu-item.component.ts