[WebProfilerBundle] Display errors logged by monolog properly in logger panel

src/Symfony/Bundle/WebProfilerBundle/Resources/views/Collector/logger.html.twig

@@ -30,7 +30,7 @@
     {% if collector.logs %}
         <ul class="alt">
             {% for log in collector.logs %}
-                <li class="{{ cycle(['odd', 'even'], loop.index) }}{% if 'ERR' == log.priorityName %} error{% endif %}">
+                <li class="{{ cycle(['odd', 'even'], loop.index) }}{% if 'ERR' == log.priorityName or 'ERROR' == log.priorityName %} error{% endif %}">
                     {{ log.priorityName }}
                     {{ log.message }}
                 </li>