Steps to reproduce:
- Go to Admin > Content > Form
- Add a new form "test1"
- Add two fields(like Text and Date)
- Go to any page, add the Form portlet and select the previous added form to show
- Edit the form and submit it
- Go back to Admin > Content > Form
- Edit the test1's fields and delete the date field
After remove field there is the pop-up window.
After remove field there isn't the pop-up window.