FEAT #12135 TIME 1:30 Add filter button for webservice accounts

src/app/user/controllers/UserController.php

...p/administration/user/users-administration.component.html

...p/administration/user/users-administration.component.scss

...app/administration/user/users-administration.component.ts

src/frontend/lang/lang-en.ts

src/frontend/lang/lang-fr.ts

src/frontend/lang/lang-nl.ts

test/unitTests/app/user/UserControllerTest.php