FIX remove some whitespaces or empty lines + add btn in absence message homepage (still commented out)

src/Bundle/ChillMainBundle/Resources/views/layout.html.twig

@@ -72,6 +72,7 @@
                         {% if app.user.isAbsent %}
                             <div class="row mb-5">
                                 <p class="alert alert-warning" role="alert">{{'absence.You are marked as being absent'|trans }}</p>
+{#                                <a class="btn btn-edit" title="Modifier" href="{{ path('chill_main_user_absence_index') }}"></a>#}
                             </div>
                         {% endif %}
                         <h2>{{ 'Search'|trans }}</h2>