Add custom classes to field container element, not field label element

[TKFZ-Michael]

Problem to Solve

When adding a custom class to a field, the class is appended to the field label element, making it somewhat less useful. Because of this, frontend form styling in our project is broken when moving from Pods 2.7.x to 2.8.

Here's my original request: #4813

Proposed Solution

I would like this class to be appended to the form field container. That way, I can ie. produce field columns with Bootstrap.

Possible Workaround

Examples Elsewhere

Screenshots / Screencast