work on liquidsoap script (fix & fade) + fix errors in monitor

cms/templates/cms/sections/section_item.html

@@ -1,4 +1,4 @@
-<section class="section_item {{ self.css_class }}">
+<section class="section_item {{ self.css_class }} {{ self.snake_name }}">
     {% block title %}
     {% if self.show_title %}<h2>{{ self.title }}</h2>{% endif %}
     {% endblock %}