Backport of "typefind: copy seqnum to new segment event" into 1.18
Backport of !700 (merged) "typefind: copy seqnum to new segment event".
Commits:
- 12bc7288 typefind: copy seqnum to new segment event
Backport of !700 (merged) "typefind: copy seqnum to new segment event".
Commits: