feat: change page tree button icon

apps/app/src/components/Sidebar/SidebarNav/PrimaryItems.tsx

@@ -29,7 +29,7 @@ export const PrimaryItems = memo((props: Props) => {
 
   return (
     <div className={styles['grw-primary-items']}>
-      <PrimaryItem sidebarMode={sidebarMode} contents={SidebarContentsType.TREE} label="Page Tree" iconName="format_list_bulleted" onHover={onItemHover} />
+      <PrimaryItem sidebarMode={sidebarMode} contents={SidebarContentsType.TREE} label="Page Tree" iconName="list" onHover={onItemHover} />
       <PrimaryItem sidebarMode={sidebarMode} contents={SidebarContentsType.CUSTOM} label="Custom Sidebar" iconName="code" onHover={onItemHover} />
       <PrimaryItem sidebarMode={sidebarMode} contents={SidebarContentsType.RECENT} label="Recent Changes" iconName="update" onHover={onItemHover} />
       <PrimaryItem sidebarMode={sidebarMode} contents={SidebarContentsType.BOOKMARKS} label="Bookmarks" iconName="bookmarks" onHover={onItemHover} />