Add a twistie / collapse function in custom forms

[#1]

Other than display logic, there is not a simple user friendly way to collapse or expand the fields/sections in a custom form. Having a twistie type function would be perfect and heavily utilized by all who creates LONG LONG custom forms.

[#2]

I agree, the ability to collapse custom form is highly required.

[#3]

This would also be helpful for users working on the forms in the Business Case. Now, I have to tell my users to keep scrolling to find the next form.