sounds: add a label to genre facet selector

panikweb_templates/templates/listen/archives.html

@@ -14,6 +14,9 @@ officiis has, hinc libris aliquam pro te.
 		<nav>
 		    {% if facets.fields.categories %}
 		    <ul class="custom padded">
+			{% if facets.fields.categories %}
+				<li><span class="mainLabel">Genre :</span></li>
+			{% endif %}
 				{% for category in facets.fields.categories %} <li>
 					  {% if category.0 in selected_categories %}
 						<a class="check icon-check count-{{ category.1 }}" href="{{ request.get_full_path|remove_category_facet:category.0 }}">