Add pods-field-input to input fields

Seems like whenever there are required fields the 'X is required' field is never displayed next to the field.
Test out and then I can do another for 3.x
Meta forms also need the pods-field-input class

Found one more place it was needed
Hook into forms with CPT so we can validate required fields
Merge pull request #2357 from jamesgol/fieldinput

Add pods-field-input to input fields