Method compare

app/src/main/java/eu/faircode/email/Core.java:4169–4176

(Message m1, Message m2)

                    // Sorting on date/time would be better, but requires fetching the headers
                    Arrays.sort(imessages, new Comparator<Message>() {
                        @Override
                        public int compare(Message m1, Message m2) {
                            try {
                                return Long.compare(ifolder.getUID(m1), ifolder.getUID(m2));
                            } catch (MessagingException ex) {
                                return 0;
                            }
                        }
                    });

                    List<Message> deleted = new ArrayList<>();