Change style of filter box.

g3w-admin/core/templates/core/group_list.html

@@ -45,12 +45,12 @@ <h1>{% trans 'Cartographic groups' %}</h1>
 
 <div id="group_list_fitler_bar" class="row">
 <section class="col-lg-5">
-    <div class="box box-solid bg-green {% if collapsed_filter_form %}collapsed-box{% endif %}">
+    <div class="box box-solid {% if collapsed_filter_form %}collapsed-box{% endif %}">
             <div class="box-header ui-sortable-handle" style="cursor: move;">
               <i class="fa fa-filter"></i>
               <h3 class="box-title">{% trans 'Filter by' %}</h3>
               <div class="box-tools pull-right">
-                <button type="button" class="btn bg-green btn-sm" data-widget="collapse"><i class="fa fa-minus"></i>
+                <button type="button" class="btn btn-sm" data-widget="collapse"><i class="fa fa-minus"></i>
                 </button>
               </div>
             </div>