Fix icon in spatial search widget

Author: amercader

ckanext/spatial/templates/spatial/snippets/spatial_query.html

@@ -14,7 +14,7 @@
 
 <section id="dataset-map" class="module module-narrow module-shallow">
     <h2 class="module-heading">
-        <i class="icon-medium icon-globe"></i>
+        <i class="fa fa-globe"></i>
         {{ _('Filter by location') }}
         <a href="{{ h.remove_url_param(['ext_bbox']) }}" class="action">{{ _('Clear') }}</a>
     </h2>