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/views/Resetting/reset_content.html.twig

@@ -0,0 +1,15 @@
+{% trans_default_domain 'FOSUserBundle' %}
+
+{{ form_start(form, { 'action': path('fos_user_resetting_reset', {'token': token}), 'attr': { 'class': 'fos_user_resetting_reset' } }) }}
+    <div class="card-content">
+        <div class="row">
+            {{ form_widget(form) }}
+        </div>
+        <div class="card-action center">
+            <button class="btn waves-effect waves-light" type="submit" name="send">
+                {{ 'resetting.reset.submit'|trans }}
+                <i class="mdi-content-send right"></i>
+            </button>
+        </div>
+    </div>
+</form>