fix archiving requests (#2563)

* add a test for archived requests

* fix archived requests

* move requests but the last one to "Archived Chats"

this way, the app looks familiar after the contact request upgrade.
the subselect was copied from the old get_last_deaddrop_fresh_msg()
(which was removed by the contact request upgrade #2514)

* just move all old requests to "Archived Chats"

ux-wise, the advantage of keeping the last one is questionable,
one may think, always the last one is shown in chatlist.

showing _all_ fresh request is not doable
as past cores did not really take care of that
and the db-state is not consistent in that regard.

that would make the already complicated code even more complicated,
so we decided to go the easy way.

src/sql/migrations.rs

@@ -468,6 +468,13 @@ paramsv![]
         recode_avatar = true;
         sql.set_db_version(77).await?;
     }
+    if dbversion < 78 {
+        // move requests to "Archived Chats",
+        // this way, the app looks familiar after the contact request upgrade.
+        info!(context, "[migration] v78");
+        sql.execute_migration("UPDATE chats SET archived=1 WHERE blocked=2;", 78)
+            .await?;
+    }
 
     Ok((
         recalc_fingerprints,