Better way to setup fields in columns

Hi,

To build form with columns, eg:

Last name First name
Address Zip Code
Another 1 Another 2
Email
Message

I need to setup “CSS Class Name” field and use “predefined classes”, but could you provide a better way to populate the field without writing/copying it.

Graphical dropdown maybe ?
| 1/2 || 1/2 | -> selecting populate “wpuf-col-half”
|1/3|| 2/3 | -> selecting populate “wpuf-col-one-third”
…