This fixes a NullPointerException (#358) where parentColumn was null if none of
the cells in this column were focused/unfocused before the column's
variable was removed by a script call. Because the NPE was triggered
during evaluation of a script, the stack trace isn't shown to the user,
making it harder to track this down. I may try to address that in
another PR.
This fixes a NullPointerException (#358) where parentColumn was null if none of the cells in this column were focused/unfocused before the column's variable was removed by a script call. Because the NPE was triggered during evaluation of a script, the stack trace isn't shown to the user, making it harder to track this down. I may try to address that in another PR.