remove unnecessary class

packages/app/src/components/Sidebar/PageTree/Item.tsx

@@ -177,7 +177,7 @@ const Item: FC<ItemProps> = (props: ItemProps) => {
   const opacityStyle = { opacity: 1.0 };
   if (page.isTarget) opacityStyle.opacity = 0.7;
 
-  const buttonClass = isOpen ? 'grw-pagetree-open' : 'grw-pagetree-close';
+  const buttonClass = isOpen ? 'grw-pagetree-open' : '';
 
   return (
     <div className="grw-pagetree-item-wrapper">

packages/app/src/styles/_page-tree.scss

@@ -19,7 +19,8 @@
 
     .grw-pagetree-button {
       background-color: transparent;
-      transition: 0.5s;
+      transition: all 0.5s ease;
+      transform: rotate(0deg);
 
       &:focus {
         box-shadow: none;
@@ -28,9 +29,6 @@
       &.grw-pagetree-open {
         transform: rotate(90deg);
       }
-      &.grw-pagetree-close {
-        transform: rotate(0deg);
-      }
     }
 
     .grw-pagetree-title-anchor {