How to repoduce it :

• open page search of the demo repository : cms/preview/www/fr/aide/recherche.html#nav
• click on sort by title
  --> the "current" doesn't display

  <div class="results-sort"><span>Trier par :</span><ul><li><div class="button"><span class="art-button-wrapper"><span class="art-button-l"></span><span class="art-button-r"></span><input type="submit" class="art-button sort" value="Pertinence" name="sort-by-score" title=""></span></div></li><li><div class="button"><span class="art-button-wrapper"><span class="art-button-l"></span><span class="art-button-r"></span><input type="submit" class="art-button sort" value="Titre" name="sort-by-title-for-sorting" title=""></span></div></li><li><div class="button"><span class="art-button-wrapper"><span class="art-button-l"></span><span class="art-button-r"></span><input type="submit" class="art-button sort" value="Date de publication" name="sort-by-last-validation" title=""></span></div></li></ul></div>