Simplify rendering of whiteboard messages

Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/html/index.html

@@ -17,24 +17,9 @@
 {% endif %}
 
 {% if whiteboard_enabled %}
-<h2>{% trans "Whiteboard" %}</h2>
-
-<div class="tabs" id="whiteboard-tabs">
-    <ul>
-        <li><a href="#messages">{% trans "Messages" %}</a></li>
-        <li><a href="#add">{% trans "Add" %}</a></li>
-    </ul>
-
-    <div id="messages">
-        {% for msg in whiteboard_messages %}
-        <snan class="">{{ msg.message }}</snan>
-        {% endfor %}
-    </div>
-
-    <div id="add">
-        not implemented :(
-    </div>
-</div>
+{% for msg in whiteboard_messages %}
+{% show_message 'info' msg.message %}
+{% endfor %}
 {% endif %}
 
 <ul class="nav nav-pills">