WIP bootstrap 3 => 4

src/UnicaenAuth/View/Helper/UserCurrent.php

src/UnicaenAuth/View/Helper/UserProfile.php

src/UnicaenAuth/View/Helper/UserProfileSelect.php

src/UnicaenAuth/View/Helper/UserUsurpationHelper.php

src/UnicaenAuth/View/Helper/partial/connect.phtml

...r/_files/expected/user_current/logged-in-translated.phtml

.../View/Helper/_files/expected/user_current/logged-in.phtml

.../_files/expected/user_current/logged-out-translated.phtml

...View/Helper/_files/expected/user_current/logged-out.phtml

view/unicaen-auth/auth/login-tabs.phtml

view/unicaen-auth/auth/login.phtml

view/unicaen-auth/auth/request-password-reset-form.phtml

view/unicaen-auth/droits/partial/tbl-link.phtml

view/unicaen-auth/droits/privileges.phtml

view/unicaen-auth/droits/roles.phtml