更新CMS全文搜索模块安装提示

modules/cms/src/main/resources/views/modules/cmsfront/themes/default/include/header.html

@@ -40,7 +40,9 @@
             <div class="form-group" title="填写关键字，按 Enter 键进行全文检索...">
               <input type="text" name="q" class="form-control" placeholder="全站搜索...">
             </div>
-            <button type="submit" class="btn btn-primary hide">搜索</button>
+            <button type="submit" class="btn btn-primary">
+              <i class="fa fa-search"></i>
+            </button>
         </form>
       </ul>
     </div>