Column width options in the form generator

When using the Bootstrap Form Generator (which is excellent) it creates it with the labels being 2-col width and the fields 10-col width. I often want to change this to something like 4-col and 8-col or 6-col and 6-col so I have to edit every element individually afterwards.

Could you add a selector for the two columns so we can set what we’d like them to be? Would save a great deal of time.