Fixed multilevel menu inconguence on opening/closing (#1817)

build/js/Tree.js

@@ -90,10 +90,10 @@
   Tree.prototype.collapse = function (tree, parentLi) {
     var collapsedEvent = $.Event(Event.collapsed);
 
-    tree.find(Selector.open).removeClass(ClassName.open);
+    //tree.find(Selector.open).removeClass(ClassName.open);
     parentLi.removeClass(ClassName.open);
     tree.slideUp(this.options.animationSpeed, function () {
-      tree.find(Selector.open + ' > ' + Selector.treeview).slideUp();
+      //tree.find(Selector.open + ' > ' + Selector.treeview).slideUp();
       $(this.element).trigger(collapsedEvent);
     }.bind(this));
   };

dist/js/adminlte.js

@@ -1074,16 +1074,16 @@ throw new Error('AdminLTE requires jQuery')
   Tree.prototype.collapse = function (tree, parentLi) {
     var collapsedEvent = $.Event(Event.collapsed);
 
-    tree.find(Selector.open).removeClass(ClassName.open);
+    //tree.find(Selector.open).removeClass(ClassName.open);
     parentLi.removeClass(ClassName.open);
     tree.slideUp(this.options.animationSpeed, function () {
-      tree.find(Selector.open + ' > ' + Selector.treeview).slideUp();
+      //tree.find(Selector.open + ' > ' + Selector.treeview).slideUp();
       $(this.element).trigger(collapsedEvent);
     }.bind(this));
   };
 
   // Private
-  
+
   Tree.prototype._setUpListeners = function () {
     var that = this;