Convert english translation file

- convert english translation to translate key
- remove baggy template for login (never used since user isn't logged in and it'll use the default theme: material)
- fix tests about text in response (now checking translation key instead of translated text)
- remove all ugly `<div class="hidden">{{ form_rest(form) }}</div>`

src/Wallabag/UserBundle/Resources/translations/wallabag_user.en.yml

@@ -1,7 +1,11 @@
 # Two factor mail
-auth_code.mailer.subject: 'Wallabag authentication Code'
-auth_code.mailer.body.hello: "Hi %user%,"
-auth_code.mailer.body.first_para: "Since you enable two factor authentication on your wallabag account and you just logged in from a new device (computer, phone, etc.), we send you a code to validate your connection."
-auth_code.mailer.body.second_para: "Here is the code:"
-auth_code.mailer.body.support: "Please don't hesitate to contact us if you have any problems:"
-auth_code.mailer.body.signature: "The wallabag team"
+auth_code:
+    on: 'on'
+    mailer:
+        subject: 'Wallabag authentication Code'
+        body:
+            hello: "Hi %user%,"
+            first_para: "Since you enable two factor authentication on your wallabag account and you just logged in from a new device (computer, phone, etc.), we send you a code to validate your connection."
+            second_para: "Here is the code:"
+            support: "Please don't hesitate to contact us if you have any problems:"
+            signature: "The wallabag team"

src/Wallabag/UserBundle/Resources/translations/wallabag_user.fr.yml

@@ -1,7 +1,11 @@
 # Two factor mail
-auth_code.mailer.subject: "Code d'authentification wallabag"
-auth_code.mailer.body.hello: "Bonjour %user%,"
-auth_code.mailer.body.first_para: "Comme vous avez activé la double authentification sur votre compte wallabag et que vous venez de vous connecter depuis un nouvel appareil (ordinateur, téléphone, etc.), nous vous envoyons un code pour valider votre connexion."
-auth_code.mailer.body.second_para: "Voici le code à renseigner :"
-auth_code.mailer.body.support: "Si vous avez un problème de connexion, n'hésitez pas à contacter le support :"
-auth_code.mailer.body.signature: "L'équipe wallabag"
+auth_code:
+    on: 'sur'
+    mailer:
+        subject: "Code d'authentification wallabag"
+        body:
+            hello: "Bonjour %user%,"
+            first_para: "Comme vous avez activé la double authentification sur votre compte wallabag et que vous venez de vous connecter depuis un nouvel appareil (ordinateur, téléphone, etc.), nous vous envoyons un code pour valider votre connexion."
+            second_para: "Voici le code à renseigner :"
+            support: "Si vous avez un problème de connexion, n'hésitez pas à contacter le support :"
+            signature: "L'équipe wallabag"

src/Wallabag/UserBundle/Resources/translations/wallabag_user.tr.yml

@@ -1,7 +1,11 @@
 # Two factor mail
-auth_code.mailer.subject: 'Wallabag Doğrulama Kodu'
-auth_code.mailer.body.hello: "Merhaba %user%,"
-auth_code.mailer.body.first_para: "wallabag hesabınızda iki adımlı doğrulamayı etkinleştirdiğinizde ve bu yeni cihaz olduğunda (bilgisayar, telefon, vs.), biz size bu işlemi doğrulamak için bir kod göndeririz."
-auth_code.mailer.body.second_para: "Bu işlem için doğrulama kodunuz:"
-auth_code.mailer.body.support: "Eğer herhangi bir soru/sorununuz varsa, bizimle iletişime geçmekten çekinmeyin:"
-auth_code.mailer.body.signature: "wallabag ekibi"
+auth_code:
+    on: 'on'
+    mailer:
+        subject: 'Wallabag Doğrulama Kodu'
+        body:
+            hello: "Merhaba %user%,"
+            first_para: "wallabag hesabınızda iki adımlı doğrulamayı etkinleştirdiğinizde ve bu yeni cihaz olduğunda (bilgisayar, telefon, vs.), biz size bu işlemi doğrulamak için bir kod göndeririz."
+            second_para: "Bu işlem için doğrulama kodunuz:"
+            support: "Eğer herhangi bir soru/sorununuz varsa, bizimle iletişime geçmekten çekinmeyin:"
+            signature: "wallabag ekibi"