When editing the column properties from inside a form, if changing either the column label or the question type, any help text that the user has entered get deleted. While you can always edit the header in the sheet itself, it does not make much sense for longer forms that may have taken multiple drafts (questions deleted/moved around = extra columns/columns out of order). It would also be useful if questions that are deleted, result in a deletion of their corresponding column to mitigate sheet cleanup.
