Update design of Collections list page (#38822)

app/javascript/mastodon/components/scrollable_list/components.tsx

@@ -1,8 +1,10 @@
 import type { ComponentPropsWithoutRef } from 'react';
-import { Children, forwardRef } from 'react';
+import { forwardRef } from 'react';
 
 import classNames from 'classnames';
 
+import { hasReactChildren } from '@/mastodon/utils/has_react_children';
+
 import { LoadingIndicator } from '../loading_indicator';
 
 export const Scrollable = forwardRef<
@@ -36,7 +38,7 @@ export const ItemList = forwardRef<
     emptyMessage?: React.ReactNode;
   }
 >(({ isLoading, emptyMessage, className, children, ...otherProps }, ref) => {
-  if (!isLoading && Children.count(children) === 0 && emptyMessage) {
+  if (!isLoading && !hasReactChildren(children) && emptyMessage) {
     return (
       <div className='empty-column-indicator'>
         <span>{emptyMessage}</span>