Allow hidden fields

Hi DingkunXie​ 

Can the product team do the following:

1. Create an option to make a field hidden or read-only
2. Allow URL parameters to populate the hidden or read-only field

Currently we can use a workaround to hide a field using branching logic, but the hidden field can't be prepopulated with the URL parameter :(

This small change will unlock a huge amount of value in the product! Especially in the age of automation and Copilot.

Looking forward to seeing this happen :)