refactor: rename Value Prop related notification components (#516)

Part 3 of REV-2130

src/courseware/course/NotificationTrigger.jsx

@@ -0,0 +1,29 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import classNames from 'classnames';
+import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
+
+import NotificationIcon from './NotificationIcon';
+import messages from './messages';
+
+function NotificationTrigger({ intl, toggleNotificationTray, isNotificationTrayVisible }) {
+  return (
+    <button
+      className={classNames('notification-trigger-btn', { active: isNotificationTrayVisible() })}
+      type="button"
+      onClick={() => { toggleNotificationTray(); }}
+      aria-label={intl.formatMessage(messages.openNotificationTrigger)}
+    >
+      {/* REV-2297 TODO: add logic for status "active" if red dot should display */}
+      <NotificationIcon status="inactive" notificationColor="bg-danger-500" />
+    </button>
+  );
+}
+
+NotificationTrigger.propTypes = {
+  intl: intlShape.isRequired,
+  toggleNotificationTray: PropTypes.func.isRequired,
+  isNotificationTrayVisible: PropTypes.func.isRequired,
+};
+
+export default injectIntl(NotificationTrigger);