Remove search icon when navbar is collapsed. re #79

templates/bootstrap/header.html

@@ -22,7 +22,7 @@
         <div class="form-group">
           <input type="text" class="form-control" placeholder="{{=it.c.i18n.searchAlt}}" name="query">
         </div>
-        <button type="submit" class="btn btn-default"><span class="glyphicon glyphicon-search"></span></button>
+        <button type="submit" class="btn btn-default hidden-xs"><span class="glyphicon glyphicon-search"></span></button>
       </form>
     </div><!--/.nav-collapse -->
   </div>