hide platform tab from navigation when team not setup (#16630)

Co-authored-by: Peer Richelsen <peeroke@gmail.com>

packages/features/shell/Shell.tsx

@@ -544,7 +544,7 @@ function UserDropdown({ small }: UserDropdownProps) {
                   </DropdownMenuItem>
                 )}
 
-                {!isPlatformPages && (
+                {!isPlatformPages && isPlatformUser && (
                   <DropdownMenuItem className="todesktop:hidden hidden lg:flex">
                     <DropdownItem
                       StartIcon="blocks"