feat(email): don't escape html in notification bodies. (#7042)

allows for post replies, etc. to show the formatting of the orginal 
post, rather than looking garbled.

closes #7034

src/notifications.js

@@ -245,7 +245,7 @@ function pushToUids(uids, notification, callback) {
 				path: notification.path,
 				subject: utils.stripHTMLTags(notification.subject || '[[notifications:new_notification_from, ' + meta.config.title + ']]'),
 				intro: utils.stripHTMLTags(notification.bodyShort),
-				body: utils.stripHTMLTags(notification.bodyLong || ''),
+				body: notification.bodyLong || '',
 				notification: notification,
 				showUnsubscribe: true,
 			}, next);