Optimization

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

@@ -654,10 +654,12 @@ public class FragmentMessages extends FragmentEx {
 
                             for (long id : ids) {
                                 EntityMessage message = db.message().getMessage(id);
+                                if (message.ui_seen != seen) {
                                     db.message().setMessageUiSeen(message.id, seen);
                                     db.message().setMessageUiIgnored(message.id, true);
                                     EntityOperation.queue(db, message, EntityOperation.SEEN, seen);
                                 }
+                            }
 
                             db.setTransactionSuccessful();
                         } finally {