FIX #12003 TIME 0:15 fix menu 1.5

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

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

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

src/frontend/app/app.component.ts

src/frontend/app/menu/main-header.component.html

src/frontend/app/menu/main-header.component.ts

src/frontend/service/privileges.service.ts