hide links panel in mobile screens

searx/templates/oscar/results.html

@@ -57,7 +57,7 @@
             </div>
             {%- endif %}
 
-            <div class="panel panel-default">
+            <div class="panel panel-default hidden-xs">
                 <div class="panel-heading">{{- "" -}}
                     <h4 class="panel-title">{{ _('Links') }}</h4>{{- "" -}}
                 </div>