Suppress invalid message sequence number error

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

@@ -1409,6 +1409,12 @@ public class Log {
                             "failed to create new store connection".equals(ex.getMessage())))
                 return null;
 
+            if (ex instanceof MessagingException &&
+                    ex.getMessage() != null &&
+                    ex.getMessage().contains("invalid message sequence number"))
+                // invalid message sequence number: message is probably expunged
+                return null;
+
             if (ex instanceof MessagingException &&
                     ex.getCause() instanceof ConnectionException &&
                     ex.getCause().getMessage() != null &&