Rename JSX files with proper .jsx extension (#23733)

app/javascript/mastodon/components/load_gap.jsx

@@ -0,0 +1,34 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { injectIntl, defineMessages } from 'react-intl';
+import Icon from 'mastodon/components/icon';
+
+const messages = defineMessages({
+  load_more: { id: 'status.load_more', defaultMessage: 'Load more' },
+});
+
+export default @injectIntl
+class LoadGap extends React.PureComponent {
+
+  static propTypes = {
+    disabled: PropTypes.bool,
+    maxId: PropTypes.string,
+    onClick: PropTypes.func.isRequired,
+    intl: PropTypes.object.isRequired,
+  };
+
+  handleClick = () => {
+    this.props.onClick(this.props.maxId);
+  };
+
+  render () {
+    const { disabled, intl } = this.props;
+
+    return (
+      <button className='load-more load-gap' disabled={disabled} onClick={this.handleClick} aria-label={intl.formatMessage(messages.load_more)}>
+        <Icon id='ellipsis-h' />
+      </button>
+    );
+  }
+
+}