Sanitize IOException/MessageRemovedException

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

@@ -390,12 +390,19 @@ public class Helper {
         if (sanitize) {
             if (ex instanceof MessageRemovedException)
                 return null;
+
+            if (ex instanceof IOException &&
+                    ex.getCause() instanceof MessageRemovedException)
+                return null;
+
             if (ex instanceof FolderClosedException)
                 return null;
+
             if (ex instanceof IllegalStateException &&
                     ("Not connected".equals(ex.getMessage()) ||
                             "This operation is not allowed on a closed folder".equals(ex.getMessage())))
                 return null;
+
             //if (ex instanceof MailConnectException && ex.getCause() instanceof UnknownHostException)
             //    return null;
         }