Keep sindex block when initiating post construction. Could help with #2087.
Merge branch 'daniel_2073' into daniel_2087
Merge branch 'next' into daniel_2087
Just added a TODO
Merge branch 'next' into daniel_2087
Assign new UUIDs to backfilled sindexes. Also updated a comment.
Merge branch 'next' into daniel_2087
Merge branch 'next' into sam_multiple_ii