* [task#121408] add hiddenTree function of thinkstepmenu.

lib/zin/wg/thinkstepmenu/js/v1.js

@@ -166,3 +166,17 @@ window.toggleQuestionShow = function()
         $(node).find('.tree-toggle').trigger('click');
     });
 }
+
+/**
+ * 点击左侧树结构下方按钮隐藏左侧树。
+ * Click the button below the left tree structure to hide the left tree.
+ *
+ * @access public
+ * @return void
+ */
+var hiddenSidbar = localStorage.getItem('hiddenSidbar');
+window.hiddenTree = function()
+{
+    localStorage.setItem('hiddenSidbar', true);
+    $('.think-node-menu').closest(".sidebar").sidebar("toggle");
+}

lib/zin/wg/thinkstepmenu/v1.php

@@ -256,7 +256,7 @@ class thinkStepMenu extends wg
                             set::size('sm'),
                             set::icon('menu-arrow-left text-gray'),
                             set::hint($this->lang->collapse),
-                            on::click()->do('$this.closest(".sidebar").sidebar("toggle");')
+                            on::click('hiddenTree')
                         )
                     ),
                     h::js("$('#mainContainer').addClass('has-sidebar');$('#mainContainer .sidebar').addClass('relative');")