Change icons in web UI (#27385)

Co-authored-by: Renaud Chaput <renchap@gmail.com>

app/javascript/mastodon/features/domain_blocks/index.jsx

@@ -60,7 +60,7 @@ class Blocks extends ImmutablePureComponent {
     const emptyMessage = <FormattedMessage id='empty_column.domain_blocks' defaultMessage='There are no blocked domains yet.' />;
 
     return (
-      <Column bindToDocument={!multiColumn} icon='minus-circle' heading={intl.formatMessage(messages.heading)}>
+      <Column bindToDocument={!multiColumn} icon='ban' heading={intl.formatMessage(messages.heading)}>
         <ColumnBackButtonSlim />
 
         <ScrollableList