Optimized unmodified download

app/src/main/java/eu/faircode/email/Core.java

@@ -3145,26 +3145,26 @@ class Core {
                     Log.i(folder.name + " deleted orphans=" + orphans);
                 }
             } else {
-                List<Message> _imessages = new ArrayList<>();
                 List<Long> _ids = new ArrayList<>();
+                List<Long> _uids = new ArrayList<>();
 
+                if (download && initialize == 0) {
                     List<EntityMessage> messages = db.message().getMessagesWithoutContent(
                             folder.id, sync_kept || force ? null : sync_time);
                     if (messages != null) {
                         Log.i(folder.name + " needs content=" + messages.size());
                         for (EntityMessage message : messages) {
-                        Message imessage = ifolder.getMessageByUID(message.uid);
-                        if (imessage != null) {
-                            _imessages.add(imessage);
                             _ids.add(message.id);
+                            _uids.add(message.uid);
                         }
                     }
                 }
 
-                search = SystemClock.elapsedRealtime();
-
-                imessages = _imessages.toArray(new Message[0]);
+                // This will result in message changed events
+                imessages = ifolder.getMessagesByUID(Helper.toLongArray(_uids));
                 ids = _ids.toArray(new Long[0]);
+
+                search = SystemClock.elapsedRealtime();
             }
 
             // Update modseq