ssb: Fix some correctly identified private messages not showing up in the private message feed.

apps/ssb/tf-tab-news-feed.js

@@ -209,7 +209,7 @@ class TfTabNewsFeedElement extends LitElement {
 					WHERE
 						(?2 IS NULL OR (messages.timestamp >= ?2)) AND messages.timestamp < ?3 AND
 						json(messages.content) LIKE '"%'
-					ORDER BY messages.sequence DESC LIMIT 20
+					ORDER BY messages.rowid DESC LIMIT 20
 				`,
 				[JSON.stringify(this.private_messages), start_time, end_time]
 			);