Checklist

• I have searched the issue tracker for open issues that relate to the same feature, before opening a new one.
• This issue only relates to a single feature. I will open new issues for any other features.

Is your feature request related to a problem?

I am trying to create model forms in which individual FormItems are added / deleted based on user input to other FormItems. I can to add FormItems using Form.Append(). The Form widget does not include a method for Form.Item.Delete(index) so I cannot remove FormItems from an existing form. There is no Form.Index.Hide(index) so I cannot hide form items either.

Is it possible to construct a solution with the existing API?

I have to rebuild the Form if I want to remove a FormItem from an existing form.

Describe the solution you'd like to see.

Implement the method Form.Remove(FormItem) which will remove a FormItem object from an existing form