Edge case of no reaction time for oddball file

[nohelix]

When no reaction time results from one of the oddball train positions (i.e. the rat false alarmed on every trial at that position), the combined unnesting doesn't work because the number of rows are different. This was an unexpected property. Serial unnesting also doesn't work because it duplicates one of the tables. To fix 2 tables need to be created and then joined.

Example file: GP5 (169) on 4/10/23