2squash: Optimize another SQL statement

Author: iequidoo

src/chat.rs

@@ -3352,11 +3352,13 @@ pub async fn marknoticed_chat(context: &Context, chat_id: ChatId) -> Result<()>
                 .filter(|&(_, state)| state == MessageState::InFresh)
                 .map(|(id, _)| id);
 
+            // NB: Enumerate `hidden` values to employ `msgs_index7`.
             let nr_msgs_noticed = conn.execute(
                 "UPDATE msgs
                     SET state=?
                     WHERE state=?
-                    AND chat_id=?",
+                        AND (hidden=0 OR hidden=1)
+                        AND chat_id=?",
                 (MessageState::InNoticed, MessageState::InFresh, chat_id),
             )?;
             Ok((nr_msgs_noticed, id_to_markseen))