New Custom Form validation logic: display "v" icon on form builder to show where validation logic exists on a field

[#1]

Description - show a "V" icon or similar in the custom form builder when there is validation logic set up on a field.

Why is this feature important to you - showing an icon allows us to quickly know, at a glance, which fields have validation logic set up. Without it, the only way for me to know is if there is NO icon, and when clicking on the field it says "Edit logic" on the right-hand panel as opposed to "Add logic". 

How would you like the feature to work - "V" icon on custom form builder, and logic details in right-hand panel when field is selected.

Current Behaviour - right now, only skip logic and display logic show icons on the form builder. No icon shows up for validation logic. 

[#2]

Yeeees! We noticed this too. It's sorely needed