We need to update the {-nr_remote_eml} counter regardless
of progress display being enabled since it's needed for
saved searches. We'll also split out the {-imported} flag
separately and only call LeiStore->done if a new message
was imported.
Note: this change is NOT expected to fix errors reported by
Thomas in <
ebf92218-1470-4602-b534-
6dae59639dc6@t-8ch.de>
Cc: Thomas Weißschuh <thomas@t-8ch.de>