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Kevin J. McCarthy authored
mx_check_mailbox() would update the header flags, but was not returning MUTT_FLAGS back to the index loop. That meant a screen redraw was needed to be notified of externally modified flags. Change maildir_update_flags() to return 1 if the flags were actually changed. Change maildir_check_mailbox() and mh_check_mailbox() to return MUTT_FLAGS when that happens. Thanks to jcdenton and mike-burns for the original patch.
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