clean imports after a rebase on master

add lint fix script and lint the project

add oauth2 code flow authentification, now login and logout operations are managed using NgXs store.

tslint : use double quote instead of single

chore(dlcm-portal): translate

add translation

Organization unit creation fix

Set language on store and determined default language from session storage, browser or default setting

Make visible the current menu

implement sass pattern for angular project