{% for flashMessage in app.session.flashbag.get('success') %}
    <div class="alert alert-success" role="alert">
        {{ flashMessage }}
    </div>
{% endfor %}

{% for flashMessage in app.session.flashbag.get('error') %}
    <div class="alert alert-danger" role="alert">
        {{ flashMessage }}
    </div>
{% endfor %}

{% for flashMessage in app.session.flashbag.get('info') %}
    <div class="alert alert-info" role="alert">
        {{ flashMessage }}
    </div>
{% endfor %}

{% for flashMessage in app.session.flashbag.get('success') %}
    <div class="alert alert-success" role="alert">
        {{ flashMessage }}
    </div>
{% endfor %}

Add support for error and info messages.
[Backoffice] Add support for error and info messages.
