[Notifier][WebProfilerBundle] Add notifier profiler panel icon

Author: jschaedl

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

@@ -5,7 +5,7 @@
 
     {% if events.messages|length %}
         {% set icon %}
-            {% include('@WebProfiler/Icon/mailer.svg') %}
+            {% include('@WebProfiler/Icon/notifier.svg') %}
             <span class="sf-toolbar-value">{{ events.messages|length }}</span>
         {% endset %}
 
@@ -68,7 +68,7 @@
     {% set events = collector.events %}
 
     <span class="label {{ events.messages|length ? '' : 'disabled' }}">
-        <span class="icon">{{ include('@WebProfiler/Icon/mailer.svg') }}</span>
+        <span class="icon">{{ include('@WebProfiler/Icon/notifier.svg') }}</span>
 
         <strong>Notifications</strong>
         {% if events.messages|length > 0 %}