fix no search button when search_fields is False

Author: wuyue92tree

adminlteui/templates/admin/search_form.html

@@ -1,22 +1,23 @@
 {% load i18n static admin_list adminlte_list %}
 
- <!--将filter和search合并到一个form中进行处理-->
+<!--将filter和search合并到一个form中进行处理-->
 
 <div id="toolbar">
     <form id="changelist-search" method="get">
         {% block filters %}
         {% if cl.has_filters %}
-            {% for spec in cl.filter_specs %}{% adminlte_admin_list_filter cl spec %}{% endfor %}
+        {% for spec in cl.filter_specs %}{% adminlte_admin_list_filter cl spec %}{% endfor %}
         {% endif %}
         {% endblock %}
 
         {% if cl.search_fields %}
-
         <div class="col-md-2"><!-- DIV needed for valid HTML -->
             <div class="form-group">
                 <input class="form-control" type="text" size="40" name="{{ search_var }}" value="{{ cl.query }}" id="searchbar" autofocus>
             </div>
         </div>
+        {% endif %}
+
         <div class="col-md-2">
             <div class="form-group" id="search_group">
                 <button type="submit" class="btn btn-primary">{% trans 'Search' %}</button>
@@ -30,4 +31,3 @@
         </div>
     </form>
 </div>
-{% endif %}