minor #26674 Updated the Messenger profiler panel (javiereguiluz)

This PR was squashed before being merged into the 4.1-dev branch (closes #26674).

Discussion
----------

Updated the Messenger profiler panel

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

The profiler icon of the new Messenger component was still pending. After talking with @sroze, we settled on two possible ideas for the icon: 1) focus on "messages"; 2) focus on "bus" / "message bus".

These are the icons for the two proposals:

| "Messages" | "Message Bus"
| --- | ---
| ![icon-1](https://user-images.githubusercontent.com/73419/37912058-da8aabb8-3111-11e8-972c-e3535ab9e1e8.png) | ![icon-2](https://user-images.githubusercontent.com/73419/37912063-dc2df556-3111-11e8-9fe8-c52a2ea0e008.png)

This is how they look inside the profiler:

"Messages"

![icon-1-profiler](https://user-images.githubusercontent.com/73419/37912208-43c402f0-3112-11e8-9a33-4e45ceb44b8b.png)

"Message Bus"

![icon-2-profiler](https://user-images.githubusercontent.com/73419/37912106-f3912f10-3111-11e8-827b-c8cc06c71ebe.png)

-----

My opinion:

* "Messages" look like "forum messages" or "chat messages". It looks wrong to me.
* Inside the profiler, "Messages" looks similar to "Translation" and we already have another "messages" icon for the "Mailer".
* For these reasons, I'd use "Message Bus".

Now, let's hear the community opinion. Thanks!

-----

If you want to test then on your computer:

"Messages"

```svg
<svg version="1.1" xmlns="http://www.w3.org/2000/svg" x="0px" y="0px" height="24" viewBox="0 0 24 24" enable-background="new 0 0 24 24" xml:space="preserve"><path fill="#aaa" d="M11.32 9.06h-8a3.07 3.07 0 0 0-3.35 3v5a3.09 3.09 0 0 0 3.35 3h2.75l4 3.69c.42.35.89.21.89-.34v-3c2 0 4-1.5 4-3.35v-5c.04-1.85-1.79-3-3.64-3zM11 16.5H4a.5.5 0 1 1 0-1h7a.5.5 0 0 1 0 1zm0-2.63H4a.5.5 0 0 1-.5-.5.5.5 0 0 1 .5-.5h7a.5.5 0 0 1 .5.5.5.5 0 0 1-.5.5zM21.29.06h-6.46A2.83 2.83 0 0 0 12 2.89v5.33c3.31 0 4 2.28 4 4.72 0 .44.46.56.8.28l3.31-3.16h1.21A2.71 2.71 0 0 0 24 7.35V2.77A2.71 2.71 0 0 0 21.29.06zm-.81 6.66h-5a.5.5 0 0 1-.5-.5.5.5 0 0 1 .5-.5h5a.5.5 0 0 1 .5.5.5.5 0 0 1-.5.5zm0-2.63h-5a.5.5 0 0 1-.5-.5.5.5 0 0 1 .5-.5h5a.5.5 0 0 1 .5.5.5.5 0 0 1-.5.5z"/></svg>
```

"Message Bus"

```svg
<svg version="1.1" xmlns="http://www.w3.org/2000/svg" x="0px" y="0px" height="24" viewBox="0 0 24 24" enable-background="new 0 0 24 24" xml:space="preserve"><path fill="#aaa" d="M16 9a2 2 0 0 0 2 2h4a2 2 0 0 0 2-2V7a2 2 0 0 0-2-2h-4a2 2 0 0 0-2 2h-3V4a1 1 0 0 0-1-1H8a2 2 0 0 0-2-2H2a2 2 0 0 0-2 2v2a2 2 0 0 0 2 2h4a2 2 0 0 0 2-2h3v6H8a2 2 0 0 0-2-2H2a2 2 0 0 0-2 2v2a2 2 0 0 0 2 2h4a2 2 0 0 0 2-2h3v9a1 1 0 0 0 2 0v-5h3a2 2 0 0 0 2 2h4a2 2 0 0 0 2-2v-2a2 2 0 0 0-2-2h-4a2 2 0 0 0-2 2h-3V9zm2.52-2.5h3a.5.5 0 0 1 0 1h-3a.5.5 0 0 1 0-1zm0 1.63h3a.5.5 0 0 1 .5.5.5.5 0 0 1-.5.5h-3a.5.5 0 0 1-.5-.5.5.5 0 0 1 .5-.52zm-13-2.82h-3a.5.5 0 0 1-.5-.5.5.5 0 0 1 .5-.5h3a.5.5 0 0 1 .5.5.5.5 0 0 1-.54.48zm0-1.62h-3a.5.5 0 0 1-.5-.5.5.5 0 0 1 .5-.5h3a.5.5 0 0 1 .5.5.5.5 0 0 1-.54.48zm0 9.62h-3a.5.5 0 0 1-.5-.5.5.5 0 0 1 .5-.5h3a.5.5 0 0 1 .5.5.5.5 0 0 1-.54.48zm0-1.62h-3a.5.5 0 0 1-.5-.5.5.5 0 0 1 .5-.5h3a.5.5 0 0 1 .5.5.5.5 0 0 1-.54.48zm13 2.81h3a.5.5 0 0 1 0 1h-3a.5.5 0 0 1 0-1zm0 1.63h3a.5.5 0 0 1 .5.5.5.5 0 0 1-.5.5h-3a.5.5 0 0 1-.5-.5.5.5 0 0 1 .5-.52z"/></svg>
```

Commits
-------

92a041c Updated the Messenger profiler panel

src/Symfony/Bundle/FrameworkBundle/Resources/config/messenger.xml

@@ -53,7 +53,7 @@
         </service>
 
         <service id="data_collector.messenger" class="Symfony\Bundle\FrameworkBundle\DataCollector\MessengerDataCollector">
-            <tag name="data_collector" template="@WebProfiler/Collector/messages.html.twig" id="messages" priority="100" />
+            <tag name="data_collector" template="@WebProfiler/Collector/messenger.html.twig" id="messenger" priority="100" />
             <tag name="message_bus_middleware" />
         </service>
 

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

@@ -0,0 +1,60 @@
+{% extends '@WebProfiler/Profiler/layout.html.twig' %}
+
+{% import _self as helper %}
+
+{% block toolbar %}
+    {% if collector.messages|length > 0 %}
+        {% set icon %}
+            {{ include('@WebProfiler/Icon/messenger.svg') }}
+            <span class="sf-toolbar-value">{{ collector.messages|length }}</span>
+        {% endset %}
+
+        {{ include('@WebProfiler/Profiler/toolbar_item.html.twig', { link: 'messenger' }) }}
+    {% endif %}
+{% endblock %}
+
+{% block menu %}
+<span class="label">
+    <span class="icon">{{ include('@WebProfiler/Icon/messenger.svg') }}</span>
+    <strong>Messages</strong>
+
+    <span class="count">
+        <span>{{ collector.messages|length }}</span>
+    </span>
+</span>
+{% endblock %}
+
+{% block panel %}
+    <h2>Messages</h2>
+
+    {% if collector.messages is empty %}
+        <div class="empty">
+            <p>No messages have been collected.</p>
+        </div>
+    {% else %}
+        <table>
+            <thead>
+            <tr>
+                <th>Message</th>
+                <th>Result</th>
+            </tr>
+            </thead>
+            <tbody>
+            {% for message in collector.messages %}
+            <tr>
+                <td>{{ message.message.type }}</td>
+                <td>
+                    {% if message.result.type is defined %}
+                        {{ message.result.type }}
+                    {% endif %}
+
+                    {% if message.exception.type is defined %}
+                        {{ message.exception.type }}
+                    {% endif %}
+                </td>
+            </tr>
+            {% endfor %}
+            </tbody>
+        </table>
+    {% endif %}
+{% endblock %}