translation and minor layout changes

templates/web/en/complete_challenge.tt2.html

 <h3>Complete email challenge</h3>
-
-<div>
-An email challenge including a validation token has been emailed to you at [% email %]. Please copy and paste the validation token in the form below to proof that you are administrator of this service.</div>
+<p>An email challenge including a validation token has been emailed to you at
+[% email %]. Please copy and paste the validation token in the form below to
+proof that you are administrator of this service.</p>
 
 <fieldset>
-    <legend>Validation Token</legend>
     <label for="token">Please provide the validation token here:</label>
     <input name="token" value="" id="token" type="text" class="required error"/>
     <input type="hidden" name="entityid" value="[% entityid %]" id="entityid"/>

templates/web/fr/complete_challenge.tt2.html

-<h3>Complete email challenge</h3>
-
-<div>
-An email challenge including a validation token has been emailed to you at [% email %]. Please copy and paste the validation token in the form below to proof that you are administrator of this service.</div>
+<h3>Valider le challenge e-mail</h3>
+<p>Un message incluant un code de validation vous a été envoyé à [% email %]. Veuillez recopier ce code dans le formulaire ci-dessous pour prouver que vous êtes l'administatreur de ce service.</p>
 
 <fieldset>
-    <legend>Validation Token</legend>
-    <label for="token">Please provide the validation token here:</label>
+    <label for="token">Veuillez fournir le code de validation:</label>
     <input name="token" value="" id="token" type="text" class="required error"/>
     <input type="hidden" name="entityid" value="[% entityid %]" id="entityid"/>
     <input type="hidden" name="email" value="[% email %]" id="email"/>