FEAT #12003 TIME 4 add privileges in front

.../administration/group/group-administration.component.html

...pp/administration/group/group-administration.component.ts

...ation/group/indexing/indexing-administration.component.ts

src/frontend/app/app.module.ts

src/frontend/app/header/header-right.component.html

src/frontend/app/header/header-right.component.ts

src/frontend/app/menu/menu-shortcut.component.html

src/frontend/app/menu/menu-shortcut.component.ts

src/frontend/service/app.guard.ts

src/frontend/service/header.service.ts

src/frontend/service/privileges.service.ts