fix parent form types

The parent type of both the email type and the textarea type is not
the form type but instead the text type.
bug #4063 fix parent form types (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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fix parent form types

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets | part of #2360

The parent type of both the email type and the textarea type is not the form type but instead the text type.

Commits
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0af354f fix parent form types