重构代码：修正移动端footer显示问题

Bootstrap.Admin/wwwroot/css/site-responsive.css

@@ -102,6 +102,10 @@
     .frame iframe {
         padding-top: 45px;
     }
+
+    footer {
+        display: none;
+    }
 }
 
 @media (min-width: 1077px) {

Bootstrap.Admin/wwwroot/js/common-scripts.js

@@ -284,6 +284,7 @@ $(function () {
     $('.frame .sidebar').on('click', 'a', function (e) {
         e.preventDefault();
         $('.main-content').addFrame({ element: $(this) });
+        $('body').removeClass('sidebar-open');
     });
 
     $('.nav-tabs').on('click', 'a', function (e) {