Form - Allow the Form elements to be sized similar group sizing.

### Description

Hi ,

Currently Form allows elements to defined in one column or 2 columns. Extend this to user defined option (or better like Dashboard groups - allow each element to have a user defined size - thereby making the layout of the form fully user managed if required)

This will allow user to fully control the appearance of his form.

### Have you provided an initial effort estimate for this issue?

I have provided an initial effort estimate