ajuste do layout das mensagens de alerta e botao add detail detail

sapl/templates/base.html

@@ -131,9 +131,9 @@
 
             {# Feedback messages #}
             {% for message in messages %}
-              <div class="alert alert-{% if message.tags == 'error' %}danger{% else %}{{ message.tags }}{% endif %} alert-dismissible fade in" role="alert">
+              <div class="alert alert-{% if message.tags == 'error' %}danger{% else %}{{ message.tags }}{% endif %} alert-dismissible" role="alert">
                 <button type="button" class="close" data-dismiss="alert" aria-label="Close">
-                  <span class="glyphicon glyphicon-remove" aria-hidden="true"></span>
+                  <span aria-hidden="true">&times;</span>
                 </button>
                 {{ message|safe }}
               </div>

sapl/templates/crud/detail_detail.html

@@ -64,7 +64,7 @@
     {% endfor %}
   {% endblock detail_content %}
 
-  <div class="actions btn-group float-right btn-group-lg" role="group">
+  <div class="actions btn-group mb-3" role="group">
     {% if view.detail_set_create_url %}
     <a href="{{ view.detail_set_create_url }}" class="btn btn-outline-primary">
       {% blocktrans with verbose_name=view.verbose_name_set %} Adicionar {{ verbose_name }} {% endblocktrans %}