working on Issue #205 navbar is broken

requirements/dev.in

setup.py

...min/templates/admin/navigation/admin_navbar_dropdown.html

.../application/templates/application/navigation/navbar.html

.../ecdc/templates/ecdc/navigation/ecdc_navbar_dropdown.html

.../owid/templates/owid/navigation/owid_navbar_dropdown.html

...laender/navigation/rki_bundeslaender_navbar_dropdown.html

...landkreise/navigation/rki_landkreise_navbar_dropdown.html

...ccination/navigation/rki_vaccination_navbar_dropdown.html

.../user/templates/user/navigation/user_navbar_dropdown.html

...nts/who/templates/who/navigation/who_navbar_dropdown.html