Outbound live stream notifications (#1663)

* First pass at browser, discord, twilio notifications

* Commit updated Javascript packages

* Remove twilio notification support

* Email notifications/smtp support

* Fix Firefox notification support, remove chrome checks

* WIP more email work

* Add support for twitter notifications

* Add stream title to discord and twitter notifications

* Update notification registration modal

* Fix hide/show email section

* Commit updated API documentation

* Commit updated Javascript packages

* Fix post-rebase missing var

* Remove unused var

* Handle unsubscribe errors for browser push

* Standardize email config prop names

* Allow overriding go live email template

* Some notifications cleanup

* Commit updated Javascript packages

* Remove email/smtp/mailjet support

* Remove more references to email notifications

Co-authored-by: Owncast <owncast@owncast.online>

webroot/js/components/chat/chat-message-view.js

@@ -46,11 +46,9 @@ export default class ChatMessageView extends Component {
     const { message, isModerator, accessToken } = this.props;
     const { user, timestamp } = message;
 
-    // User is required for this component to render.
     if (!user) {
       return null;
     }
-
     const { displayName, displayColor, createdAt, isBot } = user;
     const isAuthorModerator = checkIsModerator(message);